$-5x\left(8x-2\right)-2\left(3x-1\right)\left(2x-3\right)+4\left(5x-2\right)^2$

$\int\:\frac{e^x}{in2}dx$

$\frac{3}{\tan\left(40\right)}$

$\sec^2x-1\left(x\right)^2=\frac{1}{\sin\left(x\right)^2\cdot\cos\left(x\right)^2}$

$\lim_{x\to5}\left(\frac{x-5}{5lnx-5ln5}\right)$

$\int\left(x\frac{3}{2}-3x\frac{1}{3}\right)dx$

$\left(\sqrt{8}+\:3\right)-\:\left(9+\sqrt{8}\right)$