SymPy Gamma

Input:

summation%281/2%2A%2Ai%2C%20%28i%2C%200%2C%20oo%29%29

Error:

summation%281/2%2A%2Ai%2C%20%28i%2C%200%2C%20oo%29%29

unsupported operand type(s) for %: 'function' and 'Integer'

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