3.2 implicitplt()

  with(plots):
  implicitplot(x^2-y^2,x=-1..1,y=-1..1,numpoints=1000);
  implicitplot(sin(3 Pi x)sin(2 Pi y)+sin(2 Pi x)*Sin(3 Pi y)=0,x=-1..1,y=-1..1,numpoints=100000);