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(p(0) + p(1) + p(2))/(3) * 1 + (p(0)(-1) + p(2))/(1 + 1) * (x-1) where p(x) = 3x^2 + x - 2
(p(0) + p(1) + p(2))/(3) * 1 + (p(0)(-1) + p(2))/(1 + 1) * (x-1) where p(x) = 3x^2 + x - 2
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