$-7-8+2+2$
$\left(10a-3b\right)\left(100a^2+30ab+9b^2\:\right)$
$4-2x>10-5x$
$\left(2x-1\right)\left(2x+1\right)\left(4x^2-2x+1\right)$
$8x-71+5x-12$
$\frac{3y^{-4}}{\left(5y\right)^3}$
$-4-5+2-1$
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