> #Jan 16, 2003
> f:=x^3-3*x*y^2;   # := not =, 3*x*y not 3 x y, ends with ;, note f not f(x)!
> L:=3;             # Don't assign to things that will be on rhs like x
> plot3d(f,x=-L..L,y=-L..L);    # Need options, but later
> #add options always need title,axis others: color,style,orientation
> #
> #scaling=constrained
> #
> #numpoints=<big number> -- thousands
> #
> #helpful commands, evalf, eval, solve, 
> Pi;evalf(Pi);evalf(Pi,50);
> eval(f,{x=2,y=0});
> solve(x^2-x-2=0);solve({x+y=10,x-y=2},{x,y});solve({x+y+2*z=10,x-y-z=2},{x,y});
> solve(x^2+1=0);solve(x^4+x^3+2*x-8=0);
> #New command implicitplot3d, need with(plots);
> #
> eqn:=x^2+y^2+z^2=9;
> #
> #New command contourplot, need with(plots);
> #
> #
> #New command spacecurve
> #
> #