$\int\frac{3x^3-9x^2-30x-11}{\left(x^2-3x-10\right)}dx$
$18x\left(-9\right)$
$-16-8+23\left(+15\right)$
$\lim_{x\to\infty}\left(\frac{lnx}{x^2}\right)$
$-\left(76+\left(-13\right)\right)$
$\lim_{x\to0}\left(\frac{2^x-2^{-x}}{sen\left(x\right)}\right)$
$9x^2+39x+12$
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