$4x-4y+2z=32$
$-4<-2+\frac{3}{y}$
$\left(a^2-b^2\:\left(a-b\right)\right)$
$\left(2-y^3\right)\left(2+y^3\right)$
$\frac{x}{x^2-1}+\frac{1}{x^2-x-2}$
$\cos\left(x\right)=\frac{\csc\left(x\right)}{\tan\left(x\right)+\cot\left(x\right)}$
$\frac{1}{2}\left(\cos\left(5x\right)^2\right)$
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