原式=(5a^2b^2c^2)^4/(-5a^3bc)^2
=(5^4a^8b^8c^8)/(5^2a^6b^2c^2)
=5^2a^2b^6c^6
=25a^2b^6c^6是=(5a^2b^2c^3)^4除以(-5a^3bc)^2哦，原式=(5a^2b^2c^3)^4/(-5a^3bc)^2=(5^4a^8b^8c^12)/(5^2a^6b^2c^2)=5^2a^2b^6c^10=25a^2b^6c^10那 （2a的平方b）的四次冪乘3ab的平方c除以3ab的平方乘4b原式=(2^4a^8b^4)*(3ab^2c)/(3ab^2)(4b)=2^2a^8b^4c=4a^8b^4c