$\frac{d}{dx}6e^{x^{-5}}$

$\frac{cot\left(x\right)}{sec\left(x\right)-1}=\frac{sec\left(x\right)+1}{tan^3\left(x\right)}$

$72g^6-72g^3x+18$

$2m^2\:+\:m\:+12$

$\left(20m-n\right)\left(20m+n\right)$

$\int\left(x^{\frac{3}{2}}+5\right)^4\sqrt{x}dx$

$\lim_{x\to\infty}\left(\frac{2}{x\left(e^{\frac{2}{x}}-1\right)}\right)$