$\frac{2^3+x^3}{2+x}$
$y=\cos\left(3x\right)-\frac{1}{x}$
$4tan^2x-1=tan^2x$
$\int_0^{-1}\left(\sqrt[2]{1-x^2}\right)dx$
$\left(4v\:-3w^2\right)^3$
$4x^2-4x+63$
$\left(-15\right)+8\left(-3\right)$
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