$5x^4-32x^3-24x^2+20x+7$
$x^2-\frac{2}{6}x+n$
$-12x+6y$
$\left(v-nb\right)^2$
$4x^5-36x$
$1-16a^4b^6c^2$
$\frac{2187}{729}\:$
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