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(3/b)((a^2/4) + (1/(b-a)^2)(1/12)(b^4 - a^2(6b^2 - 8ba + 3a^2)))
(3/b)((a^2/4) + (1/(b-a)^2)(1/12)(b^4 - a^2(6b^2 - 8ba + 3a^2)))
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