$b^2+3+2b^2$
$3x^4+3xy^4z^2$
$\frac{340}{4}$
$\frac{dy}{dx}\left(e^{-x}+e^{-3y}=2e^{-3}\right)$
$\left(x-3\right)\left(x-2\right)+2$
$\left(\frac{x}{12}-4\right)\left(\frac{x}{12}+8\right)$
$4x^2-12xy+9x^2$
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