$\left(10x\:-\:9\right)\left(3x\:-\:9\right)$
$\left(5b^2+6\right)^3$
$x^2+6x\le0$
$\left(7f-3\right)\left(f^2-2f+7\right)$
$\left(9-3x\right)^3$
$3q\:\:+\:\:-q$
$\left(6\right).200$
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