$\left(\frac{\left(x+2x^2\right)}{\sqrt{x}}\right)$

$y=4tan\left(\pi\:\left(2\right)+\pi\:\right)-2$

$\int x\cdot\ln\left(\frac{1-x}{x+1}\right)dx$

$\frac{\cot\left(x\right)}{\tan\left(x\right)}+1=\csc\left(x\right)^2$

$\left(\frac{1}{2}m-\frac{2}{5}n\right).\left(\frac{1}{4}m+\frac{2}{5}n\right)$

$13\:-\left(-11\right)$

$p\left(x\right)=\frac{4}{35}\left(x\:+\:3\right)\left(x\:+\:1\right)\left(x\:-\:2\right)$