$\left(2x-5y+2x\right)dx+\left(1-6y-5x\right)dy=0$

$\cos\left(x-y\right)=-\cos\left(x\right)$

$\frac{1}{y}\frac{dy}{dx}=2ax$

$\frac{d}{dx}\left(y^x=xy\right)$

$\left[-14\:+\:\left(-23\right)\right]\:-\:\left[\left(-17\:-\:2\:\right)\:\cdot\:10\right]$

$\int_0^1\left(x^4e^{-x}\right)dx$