$\frac{x+8}{-2}>0$
$\int\:\frac{x^4}{\:\left(x^2-1\right)\left(x+2\right)}dx$
$9m^2-6^2$
$\int sin\left(2z\right)cos\left(3z\right)dz$
$\frac{d^2}{dx^2}xe^x$
$14-3m+2m-10-5m$
$4\frac{dz}{dx}=z^2-1$
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