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

$5\cos\:\left(2\theta\:\right)=5\sin\:^{\left(2\right)}\left(\theta\:\right)+2$

$3^1.3^2$

$\left(-x^3y^3z^4\right)^2\left(2xz^3\right)$

$48x^4y+36x^6z^348x\:4\:y+36x\:6\:z\:3$

$\left(-4n^2+2mn+3m^2\right)\left(2m^2+6n^2-5mn\right)$

$20+90+518b$