$\left(5xy+2x\right)^3$
$x^2-\:x+1\ge0$
$4x^2-x+2>0$
$3-2+\left(-5\right)-3-4-\left(-2\right)$
$512x^9-27y^6$
$\frac{\left(x^2+3x+2\right)}{\left(x^2+6x+8\right)}$
$-3\:-\:\left[-9\right]$
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