(3/4a^4b^7+1/2a^3b^8-1/9a^2b^6)/(-1/3ab^3)^2计算

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(3/4a^4b^7+1/2a^3b^8-1/9a^2b^6)/(-1/3ab^3)^2计算
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(3/4a^4b^7+1/2a^3b^8-1/9a^2b^6)/(-1/3ab^3)^2计算
(3/4a^4b^7+1/2a^3b^8-1/9a^2b^6)/(-1/3ab^3)^2
计算

(3/4a^4b^7+1/2a^3b^8-1/9a^2b^6)/(-1/3ab^3)^2计算
27/4a^2b+9/2ab^2-1