$x^2-m^2$
$\:\:\left(0\right)+\:\left(-0.62\right)$
$2x^3+13x^2+8x-48$
$6x+1+7x$
$2x^2-13x+21=0$
$\left(-8\right)\left(e^{-4x-4}\right)$
$6x+4=28$
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