$\left(\frac{a^5}{b^3}\right)^{-1}$

$\lim_{x\to infinity}\left(\frac{x^2}{\sqrt{x^3+4x}}\right)$

$a^4-50a^2+255$

$\left(x+2\right)\left(x+y-3\right)$

$144-9x^{12}+233\:$

$7-10-5+4+6-1$

$\int_{\frac{4\pi}{3}}^{\frac{2\pi}{3}}\left(\frac{1}{2}\left(3+6\:cosx\right)^2\right)dx$