$5-3x^2-2x^2-2x^3-x^3-3+3x^2$

$\int\frac{x}{\sqrt{3x^2+3}}dx$

$y-\frac{1}{3}\ge8$

$\cos\left(211\right)\cos\left(31\right)+\sin\left(211\right)\sin\left(31\right)$

$-14x-7=77$

$\frac{d}{dx}\left(\frac{e^x}{1-e^x}\right)$

$\frac{1}{\cos\left(x\right)^2\sin\left(x\right)}$