$x\frac{dy}{dx}+y=e\cdot\sin\left(x\right)$
$a^7-20a^5-2a^4+64a^3+40a^2-128$
$\left(6x^2+y\right)dx+\left(x-4y\right)dy=0$
$\left(-25\right)\cdot\left|\left(-15\right)+\left(-3\right)\right|$
$\left(x^4-y^4\right)\left(x-y\right)$
$\frac{8x^{12}-729y^9}{2x^4-9y^2}$
$4x^2-20xy+16y^2$
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