$-3<7-v$
$-18x^3-9x^3-6$
$x^2+7x+4$
$dydx=\left(y+1\right)\left(x^2-1\right)$
$\left(x+y-2z\right)\left(x-y+2z\right)$
$\int\frac{-9x+27}{x^2-4x-5}dx$
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