$\frac{dy}{dx}-7y=14x$

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

$\lim_{x\to-2}\left(\frac{6\cdot x}{\left|x-2\right|}\right)$

$200\cdot9$

$y=\frac{1}{3}\tan^3x+\tan x+x\:$

$\lim_{x\to-2}\left(\frac{x^3+3x+2x}{x^2-x-6}\right)$

$\left(\frac{625}{b^8}\right)^{\left(\frac{-3}{4}\right)}$