$14m^4-12m$

$x^2+20x+100=0$

$\lim_{x\to\infty}\left(\frac{x+3}{x^2-9}\right)$

$\lim_{x\to0}\left(\frac{2\left(e^x-1\right)\left(e^x\left(x-1\right)+1\right)}{x^3}\right)$

$-5-9-\left(-6\right)+\left(-2\right)+12$

$-\left[-8+\left[-3-\left(-8+12-8\right)+11\right]-10\right]$

$\int\left(x^2\left(\frac{x^3}{12}+1\right)^3\right)dx$