$\left(57\left(-9\right)\right)$
$4\left(x^2+2x+1\right)$
$\left(x-1\right)\left(x+9\right)\le0$
$-3u+7u$
$y^2\:+\:y^2\:+y^2$
$\frac{dy}{dx}=-\frac{y+2}{y\cdot\left(x+4\right)}$
$\left(1+t^2\right)sec^2x$
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