$5y^2-2y-3=0$
$\frac{dy}{dx}\left(e^{-x}\cdot y\right)=1$
$-88.02+0,067$
$\left(\frac{3}{7}+y^2\right)\left(\frac{3}{7}-y^2\right)$
$\int x\left(x+9\right)^4dx$
$\sec^2x\left(1-sin^2x\right)$
$x^2+x+15$
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