$\frac{\cos\left(x\right)^2}{\sin\left(x\right)-\sin\left(x\right)^2}=\csc\left(x\right)+1$

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

$22+1+7$

$\left(y+\frac{2}{3}\right)\left(y-\frac{2}{3}\right)$

$2ab\left(3a+4ab-6\right)$

$14\:=\:\frac{u}{6}$

$e^y-e=x^2-4x+4$