$sin\left(tan^{-1}\left(\frac{x}{2}\right)\right)$
$\left(m+8\right)\left(m-43\right)$
$2b^3+6a^2b$
$\frac{-3x^2+27}{-x+5}$
$\int\:\frac{\left(2x^2-1\right)\left(x^2+3\right)}{2\sqrt[3]{x^2}}dx$
$1235\cdot10^3$
$\int\frac{1}{\left(x^4+2x^2+1\right)\:}dx$
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