$2^2-3$

$\frac{d}{dx}\left(ln\left(cot^{-1}\left(4x+6\right)\right)\right)$

$\left(5x^2\:+\:3\right)\left(5x^2\:+\:3\right)$

$ye^{x^2}dx\:+\frac{y^2-1}{x}dy\:=\:0$

$\int_{-15}^{-5-5\sqrt{2}}\left(\frac{1}{\left(x+5\right)\left(\sqrt{10x+x^2}\right)}\right)dx$

$\frac{3x^2-x}{x^2-1}$

$-5a+3a+2b-5a$