$\csc^2a=\cot^2a+1$
$\frac{\left(z^4-3z^3+2z^2-4z+4\right)}{\left(z-1\right)^{-1}}$
$\frac{d}{dx}\ln x^9-8\ln\left(x\right)$
$\sqrt[6]{169^3}$
$y=4x^3-4x^{-1}+1$
$\frac{3}{4}\left(3x-5\right)\:$
$4y^3z^3\left(2yz^4\right)^{-3}$
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