$\frac{9}{1+\cos^2\left(x\right)}=\frac{9\sin^2\left(x\right)}{\left(1+\cos\:^2\left(x\right)\right)^2}$

$\int\left(\frac{x^2+2x+3}{x^2-3x+2}\right)\:dx$

$\left(84m^3-16y^2\right)\left(99m^3+19y^2\right)$

$a^2-14a+48$

$20x^2-9x-20$

$\left(a^{\frac{m}{n}}\right)^{\frac{m}{x}}$

$3y^3+3y^2-18y$