$-8a^3+4+4a^6$
$-107+25$
$8\cdot\left(2+9\right)$
$x^2+2x^2-8x$
$\frac{3x+10}{x+7\:}<\:7$
$\frac{2x^2-x-4}{x-1}$
$\left(5m+1\right)^2$
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