$\frac{d}{dx}\frac{xy}{e^x}=2x-5$

$\left(z^7-5\right)\cdot\left(z^7+5\right)$

$\frac{a}{s+1}+\frac{b}{s+3}+\frac{c}{s-2}$

$-9+36-5-15-23+15-36$

$\frac{dy}{dx}\left(y\:=\:ln\:\left(e^{-x}+\:xe^{-x}\right)\right)$

$\left(2\tan\left(x\right)+2\cot\left(x\right)\right)\left(\tan^2\left(x\right)+\cot^2\left(x-1\right)\right)$

$tdt+ydy=0$