$3\cdot2-5+4\cdot3-8+5\cdot2$
$\frac{-1-3x}{2}<4\left(x-7\right)$
$\left(3x\right)^3-\left(1\right)^3$
$y'-xy=x-1$
$\frac{d}{dx}\arctan x^2$
$\lim_{x\to0}\left(\frac{sen\left(1+y\right)}{\left(1+y\right)}\right)$
$9m+3m$
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