I cannot force 2D graph to show labels that I prepare in a variable.
Here are the screenshot of normal view, made when I construct labels in input data area:



You may see that there is a label near line end.

When I put the labels in a variable, and try to display the result, I see no labels:



Here is the file: temp.sm (50 КиБ) скачан 39 раз(а).

Could you please help me understand what I do wrong?

You can collect and plot as single argument:

collect(x):={sin(x),cos(x),ln(x),,,,,}

The style of construction of "Graphs" is not collectable
it excludes as well from collecting "Labels"