$8\cdot6+2$
$x^2-5x=10$
$-\left(30+26-93\right)-\left(15-16\right)$
$\left(2a+b\right)\left(2a-4b\right)$
$125a^2-45b^2$
$\left(2x-2\right)\left(6x+4\right)$
$\frac{-8a^2-12ab-4b^2}{b-a}$
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