$x^2-5x-14\le0$
$x+2x-x+3-3x$
$\frac{dy}{dx}\left(\sqrt{x+y^2}=y\right)$
$9x^2-6xn+n^2$
$\frac{dy}{dx}+x^4\cdot y=x^4\cdot y^{\frac{1}{2}}$
$\left(3x^2+2xy-7\right)+\left(7x^2-4xy+8\right)$
$x^2y+xy^2=y^2$
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