$3\left(b+8\right)$
$-198+-276$
$\frac{x^4-3x^3-2x^2}{-2x^2}$
$\frac{dm}{dt}=\frac{-30t}{t^2+5}$
$r\left(2r-1\right)$
$\left(4v+z\right)^5$
$2\sin\left(x\right)+\frac{3}{\csc\left(x\right)}$
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