$\lim_{x\to0}\left(\frac{\left(x-2\right)e^x+x+2}{8}\right)$

$2x^2-80x\cdot100$

$2\cos\left(2a\right)^2=1+\cos\left(4a\right)$

$\left(\frac{\left(x+5\right)}{\left(x^2+2\right)}\right)^2$

$\left(6x+7\right)\left(2+x\right)$

$36-4w=8w$

$\frac{dy}{dx}\left(\frac{1}{1+y}+\cos\left(x\right)-2xy\right)$