(-2ab²)²·(3a²b-2ab-1)

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(-2ab²)²·(3a²b-2ab-1)

(-2ab²)²·(3a²b-2ab-1)
(-2ab²)²·(3a²b-2ab-1)

(-2ab²)²·(3a²b-2ab-1)
(-2ab²)²·(3a²b-2ab-1)=12a^4b^5-8a^3b^5-4a^2b^4