plot_xmesh:=plot_ymesh:=35;
plot(sin(pi*sin x+y),x=(-3 .. 3),y=(-3 .. 3),hidden3d,view="30,40");
plot_xmesh:=plot_ymesh:=50;
plot(tan(x*y), x=(-2*pi/3 .. 2*pi/3), y=(-2*pi/3 .. 2*pi/3), z=(-5 .. 5), hidden3d,view="30,30");
. Axiom . Derive . Macsyma . Maple . Mathematica