code: def polynomial_congruence(expr, m):
      """
      Find the solutions to a polynomial congruence equation modulo m.
  
      Parameters
      ==========
  
      expr : integer coefficient polynomial
      m : positive integer
  
      Examples
      ========
  
      >>> from sympy.ntheory import polynomial_congruence
      >>> from sympy.abc import x
      >>> expr = x**6 - 2*x**5 -35
      >>> polynomial_congruence(expr, 6125)
      [3257]
  
      See Also
      ========
  
      sympy.polys.galoistools.gf_csolve : low level solving routine used by this routine
  
      """
      coefficients = _valid_expr(expr)
      coefficients = [num % m for num in coefficients]
      rank = len(coefficients)
      if rank == 3:
          return quadratic_congruence(*coefficients, m)
      if rank == 2:
          return quadratic_congruence(0, *coefficients, m)
      if coefficients[0] == 1 and 1 + coefficients[-1] == sum(
          coefficients
      ):
          return nthroot_mod(-coefficients[-1], rank - 1, m, True)
      return gf_csolve(coefficients, m)
  
imports: from __future__ import annotations
  from sympy.external.gmpy import gcd, lcm, invert, sqrt, legendre, jacobi, kronecker, bit_scan1, remove
  from sympy.polys import Poly
  from sympy.polys.domains import ZZ
  from sympy.polys.galoistools import gf_crt1, gf_crt2, linear_congruence, gf_csolve
  from .primetest import isprime
  from .factor_ import factorint, _perfect_power
  from .modular import crt
  from sympy.utilities.decorator import deprecated
  from sympy.utilities.memoization import recurrence_memo
  from sympy.utilities.misc import as_int
  from sympy.utilities.iterables import iproduct
  from sympy.core.random import _randint, randint
  from itertools import product
label_desc: Use image node_id 30 for calling a global function with example usage: polynomial_congruence(expr, m) and returns: gf_csolve, quadratic_congruence, quadratic_congruence, nthroot_mod