$y'+3xy+5x=0$
$2x+\sqrt{x+3}=4$
$\int\left(\frac{3cosx}{sen^3x}\right)dx$
$3x^4\cdot y^2x^4$
$2x-y-x$
$-10.62-17.5$
$\lim_{x\to2}\left(\frac{1-x^2}{\sin\left(\pi x\right)}\right)$
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