subract a^3+3a^2b-b^3 from the sum of 2a^3-b^3 and 4ba^2-a^3+b^3-1​

subract a^3+3a^2b-b^3 from the sum of 2a^3-b^3 and 4ba^2-a^3+b^3-1​

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Hadley