1.(-3mn² · m²)³2.(-a³)² · a³ + (-a²)× a^7 - (2a³)³3.(-3a²)³ + (2a³)²4.(3又1/3)^5 × (-3/10)^4 × 3/55.(-3x²y²)×(-2/3xyz)3/4×z
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