$5x+9\ge3x-11$
$x^2+18x+21$
$\left(16x+15\right)^2$
$16x^4-8x^2-12x^2+8x\cdot4x^2-2$
$x+3\left(2x^2-x-8\right)$
$\left(r+3s\right)^3$
$y^2-7y+30$
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