$2x^2+98$
$\left(30+12\right)\left(6^2+4^2\right)$
$9x^3-25x^7$
$9x^2-120-400$
$7+29x-16x^2$
$x^{3\:}-13x^2+36x$
$\frac{x^3-x^1-1}{x-1}$
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