计算：(-3/4a²）³.(4/3a³)²

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计算：(-3/4a²）³.(4/3a³)²

(-3/4a²）³.(4/3a³)²
= -(3/4a²）³.(4/3a³)²
= -27/64a^6 × 16/9 a^6
= - 3/4 a^12