$x^3+x^2-2x=0$
$\frac{d}{dx}\frac{x}{3}$
$\sin\left(x+30\right)-\cos\left(x+60\right)$
$\frac{d}{dx}\left(7\sin\left(xy^2\right)\right)=5$
$3\frac{8}{3}$
$\lim_{x\to\infty}\left(\sqrt{x+8}-\sqrt{x+7}\right)$
$\left(18\right)\left(-9\right)$
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