$\frac{1}{6}<\frac{2x-13}{12}$
$x+12\le-10$
$-4\left(11a-6\right)+9\left(4+2a\right)$
$\left(\frac{3}{5}x+\frac{4}{3}y\right)^{3}$
$\frac{x^3-12x^2-42}{x-2}$
$\left(-1\right)^{28}$
$4 x ^ { 2 } + 15 x - 250$
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