$\left(-a^3\:b\right)^4$
$-6\cdot12-13$
$\int\left(2x+3\right)sen\left(x^2+3x\right)dx$
$16-2\left(3\cdot5+1\right)$
$\lim_{x\to0}\left(\frac{\sin^52x}{4x^5}\right)$
$\left(+9\right)\left(-2\right)\left(+3\right)\left(+10\right)$
$\frac{7\cdot80}{20}$
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