Simplify:
2{m−3(n+m−2n‾)}2{m - 3(n + \overline{m - 2n})}2{m−3(n+m−2n)}
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= 2{m−3(n+m−2n)}2{m - 3(n + m - 2n)}2{m−3(n+m−2n)}
= 2{m−3((n−2n)+m)}2{m - 3((n - 2n) + m)}2{m−3((n−2n)+m)}
= 2{m−3(−n+m)}2{m - 3(-n + m)}2{m−3(−n+m)}
= 2{m+3n−3m}2{m + 3n - 3m}2{m+3n−3m}
= 2{(m−3m)+3n}2{(m - 3m) + 3n}2{(m−3m)+3n}
= 2{−2m+3n}2{-2m + 3n}2{−2m+3n}
= −4m+6n-4m + 6n−4m+6n
Hence, 2{m−3(n+m−2n‾)}=6n−4m2{m - 3(n + \overline{m - 2n})} = 6n - 4m2{m−3(n+m−2n)}=6n−4m
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