$\int\frac{3x+2}{x\left(x-1\right)^2}dx$
$4\left(\sin^2\left(x\right)+\cos^2\left(x\right)\right)=4-3\sin^2\left(2x\right)$
$\frac{1}{\sqrt{x+7}}$
$x^2-4x-21=0$
$\left(4x^3-2xy\right)^2$
$\lim_{x\to4}\left(\frac{x^2-5x+4}{x^2+2x-8}\right)$
$2\left(2x+4\right)-\left(2x-4\right)$
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