$1+\left|-1-\left(-1\right)\right|$

$-\left(2x+3\right)\left(x+5\right)$

$x^{2}\left(x-2\right)^{3}\left(x+2\right)^{3}$

$\:\int\:\frac{\left(\sqrt{x}+3\right)^4}{\sqrt{x}}dx$

$9-2^2$

$\frac{d}{dx}\left(\frac{x+7}{5-2x}\right)$

$x\frac{dy}{dx}-2y=\ln\left(3x\right)$