$\int_2^5\:2\left(x-1\right)dx$

$\int_2^2\frac{x^2}{x^3-2}dx$

$\lim_{x\to\infty}\left(\frac{\cos\left(2x\right)-cos\:\left(x\right)}{sin^2x}\right)$

$\left(a^{2}b-7b\right)\left(a^{2}b+7b\right)$

$\frac{d^2}{dx^2}\left(20^{-x}\right)$

$8x^6+12x^5+6x^4+x^3$

$\left(\frac{3}{5}m+\frac{1}{2\:}\right)\left(\frac{3}{5}m-\frac{1}{2\:}\right)$