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

$\frac{3-3\cos^2\left(x\right)}{sin^2\left(x\right)}$

$\int_0^{\pi}\left(9\:\sin\left(x\right)\right)dx$

$\frac{dy}{dx}=cos\:x\:\frac{dy}{dx}-ysenx$

$\left(3^2\cdot3^5\right)^2$

$\int6x-7dx$

$\sqrt[4]{\left(x+y\right)^3}.\sqrt[12]{\left(x+y\right)^{-1}}.\sqrt[3]{\left(x+y\right)^4}$