When plot or plot3d is passed a set or list of functions, it plots all of these functions on the same graph.

When a list of three functions is passed to plot3d, Maple displays a 3-D parametric plot.  For more information, see plot3d.  To avoid this, add the three functions as a set.

When a list of functions is plotted, options may be associated with each function.  Options are specified as option=[value1, value2, ..., valuen] with one value for each curve plotted.

Unless otherwise specified, the curves are colored using the current list of plotting colors (see plots[setcolors]).