$32a^2-72b^2$

$\int\frac{x^2}{\sqrt{x+4}}\:dx$

$\frac{\csc\left(1\right)}{1+\cot\left(1\right)}$

$klok$

$\frac{dy}{dx}=3y+5xy^2$

$\frac{7ab^2c}{6}\:-\:\frac{2ab^2c}{3}$

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