a:12345;

a*2;

f(x):=x^2 + 4*x - 2;
f(3);

wyroznik(a,b,c):=b^2-4*a*c;
wyroznik(1,4,-2);

logarytm(x, b):=log(x)/log(10);
logarytm(10,10);

	factor(10!);

factor(x^2 + x -6);

expand((x+1)^4);

ratsimp(((x^2-1)*(x-1))/((x+1)*(x-1)));

trigsimp(cos(x)^2 + sin(x)^2);

trigexpand(sin(2*x)+cos(2*x));