$\frac{\left(sec^2\theta\:\right)}{\left(csc^2\theta\:\right)}$

$\int4xe^{2x+7}dx$

$3\cdot2-7+5\:\left(12-20\right)$

$\frac{dy}{dx}+y=-\frac{4}{8-e^x}$

$\lim_{x\to02}\left(\frac{\tan^2\left(x-2\right)}{x^2-4}\right)$

$7x-11<2x+160$

$\left(a^3\right)\cdot a\cdot\left(-a\right)$