The paramplot command takes two arguments, a list of three expressions involving two parameters, and a list of the two parameters.
paramplot returns and draws the parameterized surface; the
command paramplot([f(u,v),g(u,v),h(u,v)],[u,v]) will return
and draw the surface given by x=f(u,v), y=g(u,v),
z=h(u,v).
Input:
Output: