$x^2+x-20<x^2+6x+6$
$-\left(18+12-21\right)-2-\left(8+7-19\right)$
$6x^2+62x+164=4x^2+38x+100$
$\left(3p^2-q\right)^3$
$3-2\left(x+4\right)=-3x+1$
$x+5\ge0$
$-8t^2-t^2+-6t^2+6t^2$
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