> 123!;

> 100!;

> 10!;

> evalf(123!);

> simplify(d/c+ab/d);

> expand((a+b+2*c)^3);

> factor(x^10-1);

> factor(x^12-1,2^(1/2));

>

> factor(x^12-1,I);

> factor(x^12-1,{3^(1/2),I});

> ifactor(2^100+1);

> ifactor(3^2+1);

> diff(x^6,x);

>

>

>

> diff(x^6,x$4);

> int(x^6,x$1);

> int(x^2*cos(2*x)* exp(2*x),x);

> evalf(int(cos(x^2),x=0..1));

> series(cos(x),x=0,20);

> combine(cos(a)*cos(b));

> expand(cos(a+b));

> combine(cos(a)*cos(b)*cos(c));

> solve(x^2-3*x-7);

> solve((x^2-3)*(x-7));

> solve({2*x+3=4,3*x-y=1});

> solve({x+y+z=1,2*x+y-3=0},{x,y});

> simplify(1/(1+1/(1+x)));

> sum(d^3,d=1..10);

> sum(k^2,k=1..n);

> implicitdiff(x^2*y,y,x);

> series(x/cos(x^2+x),x=0,10);

> evalf(exp(Pi*123^(1/2)),30);

>