Hi
This is regarding a TODO mentioned in risch.py in recognize_log_derivative
https://github.com/sympy/sympy/blob/master/sympy/integrals/risch.py
The hack that I thought :
a = real_roots()
b = all_roots()
if a!=b return false.
but when import all_roots
it says cant be imported
Following is the error message:
from sympy.integrals.risch import (gcdex_diophantine, frac_in,
as_poly_1t,
File "sympy/integrals/risch.py", line 29, in <module>
from sympy.polys.polytools import all_roots
ImportError: cannot import name all_roots
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