b^3n+2m-3b^(3n+2m)等于多少?

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b^3n+2m-3b^(3n+2m)等于多少?b^3n+2m-3b^(3n+2m)等于多少?b^3n+2m-3b^(3n+2m)等于多少?b^3n+2m-3b^(3n+2m)=(1-3)b^(3n+2

b^3n+2m-3b^(3n+2m)等于多少?
b^3n+2m-3b^(3n+2m)等于多少?

b^3n+2m-3b^(3n+2m)等于多少?
b^3n+2m-3b^(3n+2m)
=(1-3)b^(3n+2m)
=-2b^(3n+2m)