先化简再求值(a+b)^2-(a+b)(a-2b)-(ab^2+2/3b^3) ÷1/3b a=-2013 b=-1

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先化简再求值(a+b)^2-(a+b)(a-2b)-(ab^2+2/3b^3) ÷1/3b a=-2013 b=-1
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先化简再求值(a+b)^2-(a+b)(a-2b)-(ab^2+2/3b^3) ÷1/3b a=-2013 b=-1
先化简再求值(a+b)^2-(a+b)(a-2b)-(ab^2+2/3b^3) ÷1/3b a=-2013 b=-1

先化简再求值(a+b)^2-(a+b)(a-2b)-(ab^2+2/3b^3) ÷1/3b a=-2013 b=-1
(a+b)^2-(a+b)(a-2b)-(ab^2+2/3b^3) ÷1/3b
=a^2+2ab+b^2-a^2+ab+2b^2-3ab-2/b^4
=3b^2-2/b^4
=3-2
=1

(a+b)^2-(a+b)(a-2b)-(ab^2+2/3b^3) ÷1/3b
=a^+2ab+b^-(a^-ab-2b^)-(3ab+2b^)
=a^+2ab+b^
-a^+ab+2b^
-3ab-2b^
= b^,
当a=-2013， b=-1时原式=1.