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    <identity>
      <id>cdf0358c-6839-4283-963a-f42076cd1e86</id>
      <revision>18</revision>
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      <precision>15</precision>
      <exponentialThreshold>12</exponentialThreshold>
      <fractions>decimal</fractions>
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      <paper id="1" orientation="Portrait" width="850" height="1100" />
      <margins left="39" right="39" top="39" bottom="39" />
      <header alignment="Center" color="#a9a9a9">&amp;[DATE] &amp;[TIME] - &amp;[FILENAME]</header>
      <footer alignment="Center" color="#a9a9a9">&amp;[PAGENUM] / &amp;[COUNT]</footer>
      <backgrounds />
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  <region id="0" left="18" top="18" width="198" height="31" color="#000000" bgColor="#80ffff" fontSize="14">
    <text lang="eng">
      <p bold="true">Monte Carlo 'Pi'</p>
    </text>
  </region>
  <region id="1" left="252" top="18" width="311" height="26" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
    <math fractionType="auto" decimalPlaces="6">
      <input>
        <e type="operand">CWD</e>
        <e type="operand" style="string">C:\SmathFile</e>
        <e type="function" preserve="true" args="1">CurrentDirectory</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="2" left="18" top="54" width="76" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <math optimize="2" decimalPlaces="3">
      <input>
        <e type="operand">N</e>
        <e type="operand">10000</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="3" left="18" top="81" width="183" height="53" color="#000000" bgColor="#ffffff" fontSize="10">
    <math optimize="2" decimalPlaces="3">
      <input>
        <e type="operand">X</e>
        <e type="operand">2</e>
        <e type="operand">N</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="2">Random</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">*</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
        <e type="operand">Y</e>
        <e type="operand">2</e>
        <e type="operand">N</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="2">Random</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">*</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="4">line</e>
      </input>
    </math>
  </region>
  <region id="4" top="144" color="#000000" bgColor="#ffffff">
    <area collapsed="true">
      <title lang="eng">
        <p>     Rings     </p>
      </title>
    </area>
    <region id="5" left="18" top="180" width="526" height="164" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
      <math optimize="2" decimalPlaces="3">
        <description active="true" position="Top" lang="eng">
          <p>Fill the circle exclusive of the square</p>
        </description>
        <input>
          <e type="operand">ring_1</e>
          <e type="operand">i</e>
          <e type="operand">1</e>
          <e type="operand">N</e>
          <e type="function" preserve="true" args="2">range</e>
          <e type="operand">U</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">1</e>
          <e type="operator" args="2">&lt;</e>
          <e type="bracket">(</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">0.625</e>
          <e type="operator" args="2">&gt;</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">&amp;</e>
          <e type="operand">0</e>
          <e type="function" preserve="true" args="3">cases</e>
          <e type="operator" args="2">:</e>
          <e type="operand">V</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">1</e>
          <e type="operator" args="2">&lt;</e>
          <e type="bracket">(</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">0.625</e>
          <e type="operator" args="2">&gt;</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">&amp;</e>
          <e type="operand">0</e>
          <e type="function" preserve="true" args="3">cases</e>
          <e type="operator" args="2">:</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
          <e type="function" preserve="true" args="3">for</e>
          <e type="operand">U</e>
          <e type="operand">V</e>
          <e type="function" preserve="true" args="2">augment</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="6" left="18" top="378" width="551" height="164" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
      <math optimize="2" decimalPlaces="3">
        <description active="true" position="Top" lang="eng">
          <p>Fill the circle exclusive of the square</p>
        </description>
        <input>
          <e type="operand">ring_2</e>
          <e type="operand">i</e>
          <e type="operand">1</e>
          <e type="operand">N</e>
          <e type="function" preserve="true" args="2">range</e>
          <e type="operand">U</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">0.625</e>
          <e type="operator" args="2">&lt;</e>
          <e type="bracket">(</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">0.25</e>
          <e type="operator" args="2">&gt;</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">&amp;</e>
          <e type="operand">0</e>
          <e type="function" preserve="true" args="3">cases</e>
          <e type="operator" args="2">:</e>
          <e type="operand">V</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">0.625</e>
          <e type="operator" args="2">&lt;</e>
          <e type="bracket">(</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">0.25</e>
          <e type="operator" args="2">&gt;</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">&amp;</e>
          <e type="operand">0</e>
          <e type="function" preserve="true" args="3">cases</e>
          <e type="operator" args="2">:</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
          <e type="function" preserve="true" args="3">for</e>
          <e type="operand">U</e>
          <e type="operand">V</e>
          <e type="function" preserve="true" args="2">augment</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="7" left="18" top="567" width="534" height="164" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
      <math optimize="2" decimalPlaces="3">
        <description active="true" position="Top" lang="eng">
          <p>Fill the circle exclusive of the square</p>
        </description>
        <input>
          <e type="operand">ring_3</e>
          <e type="operand">i</e>
          <e type="operand">1</e>
          <e type="operand">N</e>
          <e type="function" preserve="true" args="2">range</e>
          <e type="operand">U</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">0.0625</e>
          <e type="operator" args="2">&lt;</e>
          <e type="bracket">(</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">0</e>
          <e type="operator" args="2">&gt;</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">&amp;</e>
          <e type="operand">0</e>
          <e type="function" preserve="true" args="3">cases</e>
          <e type="operator" args="2">:</e>
          <e type="operand">V</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">0.0625</e>
          <e type="operator" args="2">&lt;</e>
          <e type="bracket">(</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">0</e>
          <e type="operator" args="2">&gt;</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">&amp;</e>
          <e type="operand">0</e>
          <e type="function" preserve="true" args="3">cases</e>
          <e type="operator" args="2">:</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
          <e type="function" preserve="true" args="3">for</e>
          <e type="operand">U</e>
          <e type="operand">V</e>
          <e type="function" preserve="true" args="2">augment</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="8" top="774" color="#000000" bgColor="#ffffff">
      <area terminator="true" />
    </region>
  </region>
  <region id="9" left="54" top="846" width="296" height="69" color="#000000" bgColor="#ffffff" fontSize="10">
    <math evaluate="false">
      <input>
        <e type="operand">ring_1</e>
        <e type="operand">CWD</e>
        <e type="operand" style="string">ring_1</e>
        <e type="function" preserve="true" args="3">wfile</e>
        <e type="operand">ring_2</e>
        <e type="operand">CWD</e>
        <e type="operand" style="string">ring_2</e>
        <e type="function" preserve="true" args="3">wfile</e>
        <e type="operand">ring_3</e>
        <e type="operand">CWD</e>
        <e type="operand" style="string">ring_3</e>
        <e type="function" preserve="true" args="3">wfile</e>
        <e type="operand">3</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="5">sys</e>
      </input>
      <result action="numeric">
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="operand">3</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="5">sys</e>
      </result>
    </math>
  </region>
  <region id="10" left="387" top="846" width="249" height="69" color="#000000" bgColor="#ffffff" fontSize="10">
    <math evaluate="false">
      <input>
        <e type="operand">ring_1</e>
        <e type="operand">CWD</e>
        <e type="operand" style="string">ring_1</e>
        <e type="function" preserve="true" args="2">rfile</e>
        <e type="operator" args="2">:</e>
        <e type="operand">ring_2</e>
        <e type="operand">CWD</e>
        <e type="operand" style="string">ring_2</e>
        <e type="function" preserve="true" args="2">rfile</e>
        <e type="operator" args="2">:</e>
        <e type="operand">ring_3</e>
        <e type="operand">CWD</e>
        <e type="operand" style="string">ring_3</e>
        <e type="function" preserve="true" args="2">rfile</e>
        <e type="operator" args="2">:</e>
        <e type="operand">3</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="5">sys</e>
      </input>
    </math>
  </region>
  <region id="11" top="945" color="#000000" bgColor="#ffffff">
    <area collapsed="true">
      <title lang="eng">
        <p>     Square NOT used     </p>
      </title>
    </area>
    <region id="12" left="18" top="963" width="346" height="176" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
      <math optimize="2" evaluate="false" decimalPlaces="3">
        <description active="true" position="Top" lang="eng">
          <p>Fill the square exclusive of circle</p>
        </description>
        <input>
          <e type="operand">Square</e>
          <e type="operand">i</e>
          <e type="operand">1</e>
          <e type="operand">N</e>
          <e type="function" preserve="true" args="2">range</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">0</e>
          <e type="operand">X</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">Y</e>
          <e type="operand">i</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">1</e>
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