$-\frac{2tanx}{1-sec^2x}$

$-\frac{1}{3}x\:+\frac{1}{2}y\:+\frac{3}{8}-3y+2x-\frac{1}{6}y-\frac{3}{4}x-\frac{1}{2}$

$\int x\left(x^2+4\right)^{\frac{3}{2}}dx$

$\lim_{x\to2}\left(-x^2+4x-2\right)$

$y^{\prime}=\frac{x\sqrt{x^{2}-1}}{y}$

$\sqrt{\sqrt[50000000000]{3.1416}}$

$\sin\left(o\right)\left(\cot\left(o\right)+\tan\left(o\right)\right)=\sec\left(o\right)$