$\lim\:_{x\to\:0}\left(sen\left(x\right)ln\left(\frac{x}{e^x-1}\right)\right)$
$\frac{80.01}{-12.7}$
$\left(3\left(1+4x\right)\right)^{-\frac{1}{8}}$
$\left(x+3\right)\left(x-4\right)\ge\left(x+4\right)\left(x-4\right)$
$m+n+2m+3n$
$\int-sec^4x\:dx$
$739\cdot46$
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