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factor%28x%2A%2A2%20%2B%204%2Ax%2Ay%20%2B%204%2Ay%2A%2A2%29
factor%28x%2A%2A2%20%2B%204%2Ax%2Ay%20%2B%204%2Ay%2A%2A2%29
unsupported operand type(s) for %: 'function' and 'Integer'
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