$4\left(x+5\left(5y-x\right)\right)$
$\frac{d}{dx}\left(4x^4-6x+2\right)^8$
$\int\left(4e^x-\frac{2}{x}\right)dx$
$-5t\:+\:10\:=25$
$\lim_{x\to0}\frac{\sqrt{2}-\sqrt{1+cosx}}{3sin^2x}$
$\frac{\csc\left(b\right)}{\tan\left(b\right)+\cot\left(b\right)}=\cos\left(b\right)$
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