(-1)³(3a³b²)³(-2/3a²b³)³

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(-1)³(3a³b²)³(-2/3a²b³)³
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(-1)³(3a³b²)³(-2/3a²b³)³
(-1)³(3a³b²)³(-2/3a²b³)³

(-1)³(3a³b²)³(-2/3a²b³)³
原式=[-3a³b²*(-2/3a²b³)]³
=(2a^5b^5)³
=8a^15b^15