计算(3a^2b-7ab^2-a^2b^2)`5ab
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计算(3a^2b-7ab^2-a^2b^2)`5ab
![计算(3a^2b-7ab^2-a^2b^2)`5ab](/uploads/image/z/18528576-24-6.jpg?t=%E8%AE%A1%E7%AE%97%283a%5E2b-7ab%5E2-a%5E2b%5E2%29%605ab)
(3a^2b-7ab^2-a^2b^2)*5ab
=15a^3b^2-35a^2b^3-5a^3b^3
=15a^3b^2-35a^2b^3-5a^3b^3
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