$\left(\frac{2}{3}m-4n\right)+\left(\frac{2}{3}m-4n\right)+\left(\frac{2}{3}m-4n\right)+\left(\frac{2}{3}m-4n\right)$
$\lim_{x\to0}\frac{e^x-e^{-x}}{sen0}$
$3a^2+8a+5$
$\int\left(x^3-1\right)^5\:dx$
$2z^2-2z=1$
$x^3y^6-125$
$\int_0^{\infty}\left(xe^{x^2}\right)dx$
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