ycb_sympy_pr18698

what a new run launched now would send

sqf and sqf_list output is not consistant
The example below is wrong in the sense that we should have (x*_2 - 5_x + 6, 3) and not 2 factors of multiplicity 3.

```
>  sqf_list(  (x**2 + 1)  * (x - 1)**2 * (x - 2)**3 * (x - 3)**3  )

>  (1, [(x**2 + 1, 1), (x - 1, 2), (x - 3, 3), (x - 2, 3)])
```

whereas below is correct --- one factor of multiplicity 2

```
>  sqf_list( x**5 - 2*x**4 - 2*x**3 + 4*x**2 + x - 2 )

>  (1, [(x - 2, 1), (x**2 - 1, 2)])
```

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