$\frac{d}{dx}x^{\frac{-2}{3}}\left(2x^2+3x^{\frac{-2}{3}}\right)$
$9am-7an+8mn-8am+4an+5mn$
$\lim_{x\to0}\left(\sin\left(\sqrt{x^2}\right)\right)$
$\int x^3e^{-5}dx$
$1-\frac{0.628^2\cdot5}{9.81}$
$196\:+4$
$\int\frac{x+3}{\left(x-1\right)^2\sqrt{3+2x-x^2}}dx$
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