$-\cos\left(x\right)\left(\sin\left(x\right)+\cos\left(x\right)\right)$

$h ( t ) = \sqrt { t } ( 1 - t ^ { 2 } )$

$\frac{x^4-2x^3+3\:x-6}{x-3}$

$\int_e^{\sqrt{\left(x\right)}}dx$

$50y+\frac{dy}{dx}=5$

$-\:8\:+\left(\left(-\:3\right)\:-\:7\right)\:-\:\left(-\:21\right)$

$\lim_{x\to\infty}5e^x+3e^x$