Reference: drawSet
drawSet(S) plots the set S ⊂ R^2 in the 2D visualization window.
drawSet(S, s) plots the set S ⊂ R^2 in the 2D visualization window using the style (CSS) s.
Examples: set ≔ createGraph("sin(x)", "x", [-10, 10, 0.001])
derivative ≔ createGraph("cos(x)", "x", [-10, 10, 0.001])
drawSet("set")
drawSet("derivative", "colour:gold")