$x-y+xy'=0$
$\frac{dy}{dx}=\frac{1}{22}y\left(11-2y\right)$
$12+\left|\left(-18\right)+\left(-100\right)\right|-130$
$4+8\cdot3-\frac{100}{\left(-5\right)}^2$
$\lim_{x\to0}\left(\frac{e^x-e^{-x}}{sen^2\left(x\right)}\right)$
$3x^2-45=30$
$3^2+3^3$
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