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m^2(m-2)+2m^2(m+3)-6m (m-4)=...

`m^2(m-2)+2m^2(m+3)-6m (m-4)`=_

A

m-`24m^4`

B

`m^4`+ 24m

C

`m^4` +2m.

D

m + `4m^2`

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