求单项式a^2b,-2^3ab^2,3a^2b,(-2)^2ab^2的和

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求单项式a^2b,-2^3ab^2,3a^2b,(-2)^2ab^2的和求单项式a^2b,-2^3ab^2,3a^2b,(-2)^2ab^2的和求单项式a^2b,-2^3ab^2,3a^2b,(-2)

求单项式a^2b,-2^3ab^2,3a^2b,(-2)^2ab^2的和
求单项式a^2b,-2^3ab^2,3a^2b,(-2)^2ab^2的和

求单项式a^2b,-2^3ab^2,3a^2b,(-2)^2ab^2的和
a^2b-2^3ab^2+3a^2b+(-2)^2ab^2
=a^2b-8ab^2+3a^2b+4ab^2
=4a^2b-4ab^2