$2cos\theta\:+1=0$
$\int\sqrt{4x-12}dx$
$\frac{4}{9a^2}-\frac{2}{3a}+\frac{1}{4}$
$\lim_{x\to-2}\left(\frac{\left|8x+16\right|}{4x+8}\right)$
$3x\frac{dy}{dx}-3y=1$
$\frac{dy}{dx}=3y^2-60y$
$14+2+2$
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