$4x+6>1$
$\left(2x+3\right)\left(x^{2}+3x\right)^{2}$
$12^2-18-12$
$14d-9+21w-7dw+2$
$\left(2x-5y^3+4\right)^2$
$\left(x^3-8\right)+\left(3x^2+7\right)$
$x^2-10x+21=0$
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