Sample computations and plots with Maple

> with(plots):

>

> Int(exp(-x^2),x=0..infinity);value(%);

> a:=1; plot(sin(a*x), x=-Pi..Pi, thickness=2, scaling=constrained);

> animate([sin(x*t),x,x=-4..4], t=1..4, coords=polar, numpoints=200, frames=100, scaling=constrained, thickness=3, color=blue);

>

>

> animate3d([r*cos(theta),r*sin(theta),sqrt(r^2-u*abs(u))], r=0..5, theta=0..2*Pi, u=-4..4, frames=40, orientation=[30,70], axes=boxed);

>