Series[PolyLog[2, I e^[+I 1/2 Pi x]] + PolyLog[2, I e^[-I 1/2 Pi x]], {x, 0, 8}]Series[PolyLog[2, I e^[+I 1/2 Pi x]] + PolyLog[2, I e^[-I 1/2 Pi x]], {x, 0, 8}]

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