$8x\left(1-x^2\right)$
$3x^2-8x+-2x^2-x+3$
$12j^3-8j^2$
$2x\:\le\:2\:\left(x-1\right)$
$5x^2y^3z^4;\:x=-1;\:y=-1;\:z=-1$
$x^2+20x+10\ge0$
$\frac{a^3-27b^3}{3a-9b}$
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