$4a^2+12+9$
$121x^8-1$
$\int\frac{2}{\sqrt{4x^2}+8x+68}dx$
$x^{-b}$
$\left(5c^3+2\sqrt{s}\right)\left(5c^3-2\sqrt{s}\right)$
$\frac{d}{dx}x^{-4}+20$
$16+5-26+3-6-14$
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