$\frac{d}{dx}x\sqrt{x^2+50}$
$sin\pi-x$
$7\left(-p+9\right)$
$\sqrt{1}3$
$\left(m-12\right)\left(m+7\right)$
$x^4-24x^2+144$
$\frac{cosx}{sinxcotx}=1$
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