SymPy Gamma

Input:

diff%28%28sin%28x%29 * x%5E2%29 %2F %281 %2B tan%28cot%28x%29%29%29%29

Error:

diff%28%28sin%28x%29 * x%5E2%29 %2F %281 %2B tan%28cot%28x%29%29%29%29

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

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