$\int4s\sqrt{s-5}ds$

$\int_1^{\infty}\left(\frac{3}{e^x+5}\right)dx$

$\left[25+3\cdot\left(5\cdot3\right)\right]\cdot\left[\frac{\left(6+8\right)}{\left(\frac{6}{3}\right)}\right]$

$4m-8mn-4m+8n$

$\lim_{x\to1}\left(\frac{e}{e^x-e}-\:\frac{1}{x-1}\right)$

$\left(x-16\right)\left(x^2+16x+256\right)$

$\left(2^{-4}\right)^3$