$\frac{dy}{dx}-\frac{y}{2x}=2x$

$\left(-2y^5z\right)\left(x^2z\right)$

$\lim_{x\to2\pi}\left(\frac{\cos\left(x\right)-1}{x-2\pi}\right)$

$\lim_{x\to-2}\left(\frac{x^2+3x+2}{x+2}\right)$

$tan^2x+\frac{1}{sen\:x\cdot\:csc\:x}$

$\frac{1}{4}\left(16+4p\right)$

$y^{-8}=x$