$\frac{d}{dx}3tany+4x^2y^3=9$
$\csc\left(x\right)\left(\cos x+\sin x\right)=\cot\left(x\right)+1$
$\left(q+7\right)x\left(q+10\right)$
$\lim_{x\to-2}\left(\frac{4x^2+18x}{x+2}\right)$
$\int\cos\left(\frac{2x}{3}\right)dx$
$-100+50-188+70+38-20$
$xdx+\sec x\sin ydy$
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