$\frac{dy}{dx}+2xy=xy^2+x$
$-3xy^2,7y^2x,xy^2$
$r^2+26r$
$tan^2x-tan^2xsin^2x=sin^2x$
$\left[x^{\frac{1}{3}}-x^{-\frac{1}{3}}\right]\left(x^{\frac{2}{3}}+1+x^{-\frac{2}{3}}\right)$
$36+12m^2+m^2$
$\frac{3^2}{9}$
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