$-\frac{1}{2}\left(0\right)^4+2\left(0\right)^2+\left(0\right)-2$
$\int\:\frac{3x+7}{\left(x+3\right)\left(x^2+3x+2\right)}dx$
$\left(m\:-\:3\right)\left(m\:-\:7\right)$
$-42-\left(-8\right)$
$2-4-y^2$
$\left(4a+3\right)\left(4a-8\right)$
$\frac{\cot x}{-1+\csc x}-\frac{\csc x}{\cot x};\tan x$
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