> plot(1+x^2-x^3,x=-1/2..1);

> plot(x-cos(x),x=-3..6);

> plot(x^3+2*x^2-1,x=-2..2);

> plot(x^5+x,x=-3/2..3/2);

> plot3d(x^2+y^2-4*x+6*y+25,x=1..3,y=-4..-2);

> plot3d(x^3+y^3+3*x*y,x=-1/2..1/2,y=-1/2..1/2);

> plot3d(x^3+y^3+3*x*y,x=-3/2..-1/2,y=-3/2..-1/2);

> plot3d(x*y*(20-x-y)^2,x=4..6,y=4..6);

>

> plot(x^3-(3*x^2-7)^2/16,x=-sqrt(7/3)..sqrt(7/3));

>