$\int\:2e^{-2x}dx$

$\lim_{x\to0}\left(\frac{2x}{\left(1-x^2\right)sin\left(x\right)}\right)$

$\left(\frac{1}{4}x^2+\frac{1}{3}y-1\right)^3$

$\left(3x^3-2\right)^2\left(3x-x^2\right)^2$

$4x^4y-8x^2y^2-2xy^3$

$\left(-5\right)\:^3+\left(-9\right)\left(+6\right)^2$

$\tan x+\cos x\csc x=\csc x\sec x$