.SH EXAMPLES
.nf
> a = x^2\-x\-2;
-\-x+x^2\-2
+\-2\-x+x^2
> b = (x+1)^2;
(x+1)^2
> s = a/b;
-(x+1)^(\-2)*(\-x+x^2\-2)
+(x+1)^(\-2)*(\-2\-x+x^2)
> diff(s, x);
(2*x\-1)*(x+1)^(\-2)\-2*(x+1)^(\-3)*(\-x+x^2\-2)
> normal(s);
x
> s;
(x+1)^(\-2)*(\-x+x^2\-2)
+> series(sin(x),x==0,6);
+1*x+(\-1/6)*x^3+1/120*x^5+Order(x^6)
> lsolve([3*x+5*y == 7], [x, y]);
[x==\-5/3*y+7/3,y==y]
> lsolve([3*x+5*y == 7, \-2*x+10*y == \-5], [x, y]);