(-2ab^2)^2(3a^2b-2ab-1)
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(-2ab^2)^2(3a^2b-2ab-1)(-2ab^2)^2(3a^2b-2ab-1)(-2ab^2)^2(3a^2b-2ab-1)(-2ab^2)^2(3a^2b-2ab-1)=4a^2b^4
(-2ab^2)^2(3a^2b-2ab-1)
(-2ab^2)^2(3a^2b-2ab-1)
(-2ab^2)^2(3a^2b-2ab-1)
(-2ab^2)^2(3a^2b-2ab-1)
=4a^2b^4(3a^2b-2ab-1)
=12a^4b^5-8a^3b^5-4a^2b^4
(-2ab^2)^2(3a^2b-2ab-1)
=4a^2b^4·【3a^2b-2ab-1】
=4a^4b^5-8a^3b^5-4a^2b^4
a^2-3ab+b^2/ab=( )/ab-3
a^2-3ab+b^2/ab=( )/ab -3
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快
a+b/2ab
2AB/A+B
a+b/2ab
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