$\left(2x-5-9x^6\right)\:\left(2x-5+9x^6\right)$
$5m+m^2-1$
$\left(x^2+2\right)dx+y^2dy=0$
$e^y\cos\left(x\right)\frac{dy}{dx}=e^y\sin\left(2x\right)$
$4x^2+4xy$
$-5+\sqrt{-2}$
$\frac{x^{2}+2x-3}{5x}$
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