$\left(7y^2\:+\:\frac{y}{9}\right)\left(7y^2-\:\frac{y}{9}\right)$

$\left(-5\right)^2x\left(-5\right)^1x\left(-5\right)^0$

$\frac{d}{dx}\left(2x^7-x^2\right)\left(\frac{\left(x-1\right)}{x+1}\right)$

$tan\left(x\right)+cos\left(x\right)csc\left(x\right)=sec\left(x\right)csc\left(x\right)+ctg\left(x\right)$

$\left(12-3m\right)\left(12+3m\right)$

$\sqrt[6]{u^5}-2+1$

$\int2000xe^{-0.2x}dx$