$x^2-8x-16$
$\:y=\frac{2}{3}x^2+\frac{3}{5}x-7$
$\left(6ab+c\right)\left(6ab+c\right)$
$9\le9x+7$
$\left(5y^{a+1}-4\right)\left(5y^{a+1}-14\right)$
$x^2+2x+2x$
$3b+6b+-10b-5b+-10b$
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