$\frac{1}{5}\:\left(15+10k\right)$
$\int\left(2-sin\left(x\right)\right)dx$
$1-x^2\le0$
$\frac{sen}{tan}+\frac{sec}{sen}$
$25x-15+4x+5$
$\int14x^{-1}dx$
$-8t-7s-m$
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