$\frac{d}{dx}\left(\arccos\left(a+x\right)\right)$
$x^2-5x+x$
$\sqrt{48}\cdot\sqrt{3}$
$3tanx+4=tanx-2$
$\left(12a+7b\right)\left(a-2b\right)$
$y\left(-1+3y^2-2y\right)$
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