$90m\:+\:12n\:-\:5m\:+\:3n\:+\:95$
$36-8+5$
$2+\left(-4\right)-\left(-10\right)+\left(-12\right)$
$\left(\frac{1}{2}m+2n\right)^2$
$4x+6+4\left(x+2\right)\ge-6\left(-2-2x\right)$
$126m^6-343n^3$
$49m^4-121n^6$
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