$2m^2+\left(m^2-1\right)^2=\left(m^2+1\right)^2$
$\left(x+3\right)\cdot2=54$
$\left(2x^2+4y^2\right)^2$
$-4+3.5$
$68-\left(-46\right)$
$4x^2-4x+8$
$4+\left(-2\right)+4-\left(6\right)$
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