sympy__sympy-18698
The issue is in the _symbolic_factor_list function in sympy/polys/polytools.py - it needs to post-process the results to combine factors with the same multiplicity.
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Based on the GitHub issue description and the discussion in the comments, I can understand the problem clearly:
1. `sqf_list((x**2 + 1) * (x - 1)**2 * (x - 2)**3 * (x - 3)**3)` returns `(1, [(x**2 + 1, 1), (x - 1, 2), (x - 3, 3), (x - 2, 3)])`
2. But it should combine factors with the same multiplicity: `(1, [(x**2 + 1, 1), (x - 1, 2), (x**2 - 5*x + 6, 3)])`
3. The `Poly.sqf_list()` method works correctly
The issue is in the `_symbolic_factor_list` function in `sympy/polys/polytools.py` - it needs to post-process the results to combine factors with the same multiplicity.
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