$\left(y-2\right)\left(y-4\right)$
$9-2x\ge12+5x$
$11+7.6+10.5$
$-7y=-98$
$2x+x+x$
$3\left(x-4\right)\le2\left(2-x\right)$
$f\left(x\right)=3x^2+5x^2+2x-5$
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