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        <e type="operand">TOL</e>
        <e type="function" args="4">Singular</e>
      </input>
      <result action="numeric">
        <e type="operand">29802</e>
      </result>
    </math>
  </region>
  <region id="15" left="495" top="648" width="163" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math decimalPlaces="1">
      <input>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="1">time</e>
        <e type="operand">t0</e>
        <e type="operator" args="2">-</e>
      </input>
      <contract>
        <e type="operand" style="unit">min</e>
      </contract>
      <result action="numeric">
        <e type="operand">0.3</e>
      </result>
    </math>
  </region>
  <region id="16" left="495" top="675" width="110" height="66" color="#000000" bgColor="#ffffff" fontSize="10">
    <math error="43">
      <description active="true" position="Right" lang="eng">
        <p>for sure, acc option50 ≤ acc is non-sense</p>
      </description>
      <input>
        <e type="operand">x</e>
        <e type="function" args="1">f</e>
        <e type="operand">x</e>
        <e type="operand">a</e>
        <e type="operand">b</e>
        <e type="function" preserve="true" args="4">int</e>
      </input>
      <result action="numeric">
        <e type="operand">#</e>
      </result>
    </math>
  </region>
  <region id="17" left="225" top="756" width="175" height="43" color="#000000" bgColor="#ffffff" fontSize="10">
    <math decimalPlaces="0">
      <input>
        <e type="operand">b</e>
        <e type="operand">a</e>
        <e type="operator" args="2">-</e>
        <e type="bracket">(</e>
        <e type="operand">a</e>
        <e type="operand">b</e>
        <e type="operator" args="2">+</e>
        <e type="operand">2</e>
        <e type="operator" args="2">/</e>
        <e type="function" args="1">f</e>
        <e type="operator" args="2">*</e>
      </input>
      <result action="numeric">
        <e type="operand">43139</e>
      </result>
    </math>
  </region>
  <region id="18" left="225" top="810" width="275" height="45" color="#000000" bgColor="#ffffff" fontSize="10">
    <math decimalPlaces="0">
      <input>
        <e type="operand">b</e>
        <e type="operand">a</e>
        <e type="operator" args="2">-</e>
        <e type="operand">6</e>
        <e type="operator" args="2">/</e>
        <e type="operand">2</e>
        <e type="operand">a</e>
        <e type="operator" args="2">*</e>
        <e type="operand">b</e>
        <e type="operator" args="2">+</e>
        <e type="operand">3</e>
        <e type="operator" args="2">/</e>
        <e type="function" args="1">f</e>
        <e type="operand">a</e>
        <e type="operand">2</e>
        <e type="operand">b</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">+</e>
        <e type="operand">3</e>
        <e type="operator" args="2">/</e>
        <e type="function" args="1">f</e>
        <e type="operator" args="2">+</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">*</e>
      </input>
      <result action="numeric">
        <e type="operand">15148</e>
      </result>
    </math>
  </region>
</regions>