$\left(x+6\right)\left(x+2\right)$

$\sqrt{\left(\frac{2x}{\sqrt{1+5x^2}}\right)^2}$

$e^y\left(e^y-\frac{y}{e^y}\right)\cos\left(x\right)\frac{dy}{dx}=e^ysin2x$

$\frac{2x^2+7x+11}{x+2}$

$\frac{d}{dx}\:3^{2x}\cdot tan\:4x$

$yln\left(x\right)y'=\frac{y^2+9}{x}$

$\int\:\left(x+1\right)^2x^3dx$