$-20\left(9\right)\left(-3\right)\left(-4\right)$
$sen\frac{\pi\:}{3}cos\frac{5\pi\:}{6}+cos\frac{\pi\:}{3}sen\frac{5\pi\:}{6}$
$\lim_{x\to0}\left(\frac{x^2+10sin\left(x\right)}{x}\right)$
$9x-3\le0$
$\left(7x^3-12x^2+8x-1\right)\left(x^2+3\right)$
$\int x^23^{1-x^3}dx$
$\frac{a}{2}+\frac{a}{3}+\frac{a}{4}$
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