$\left(9x^4+3x^2+1\right)\left(3x^3-x\right)$

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

$\frac{d}{dx}\left(e^{xy}+xy=2\right)$

$\left(x+1\right)\cdot\left(x+\frac{1}{2}\right)$

$\left(+15\right)\cdot\left(+66\right)$

$\lim_{x\to0}\left(x^2+8\right)$

$\int\left(\frac{x^4}{4}\right)dx$