$24b^2-53b+28$
$\left(2x^2+10\right)^2$
$c^2+7c+12$
$x^2+3x-15$
$\left(2x+1\right)\left(2x-1\right)=4x^2+1$
$\left(-18+7+3\right)+\left(12-7+9\right)+\left(-12+5\right)$
$-\:32\:-1\:-17\:-10$
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