(2a%2B1)%5E4 %2B (2b%2B1)%5E4 %2B (2c)%5E4 - 2(2a%2B1)%5E2 (2b%2B1)%5E2 - 2(2b%2B1)%5E2 (2c)%5E2 - 2(2c)%5E2 (2a%2B1)%5E2

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