$4n+2n^8+3n^8-5n$

$2a+5a-b$

$-8x^{3}y^{2}\left(2x^{4}y^{4}\right)$

$2sen^2\theta\:\:-cos2\theta\:=0$

$\log\left(x\right)-\log\left(x+1\right)=3\log\left(4\right)$

$\left(ce+y\right)\left(2-\sqrt{y}\right)$

$\int_{\frac{\pi}{4}}^{\frac{\pi}{2}}\left(-2cot\left(x\right)csc^2\left(x\right)\right)dx$