$\left(5x^2+6x\right)^2$
$4m^2-28m+49$
$2^2\left(3\left(-6+2\right)+3\left(4-7\right)\right)$
$36-3x=9$
$36+21c^2-132c$
$\int_2\left(x\sqrt{2}-x\right)dx$
$x^2+20x-86$
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