$\frac{2x^2-8}{3x-2\sqrt{1-4x}}$
$\sqrt[4]{b^8}$
$\lim_{y\to\infty}\left(ln5x-ln\left(x+2\right)\right)$
$\left(x+a\right)\left(x+b\right)$
$23m-32m$
$\int\:\frac{x^2-6x+9}{\sqrt{x^2-6x+18}}dx$
$-\frac{1+\tan^2x}{\tan x}=-\frac{1}{\cos x\sin x}$
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