code: def no_cancel_b_large(b, c, n, DE):
      """
      Poly Risch Differential Equation - No cancellation: deg(b) large enough.
  
      Explanation
      ===========
  
      Given a derivation D on k[t], ``n`` either an integer or +oo, and ``b``,``c``
      in k[t] with ``b != 0`` and either D == d/dt or
      deg(b) > max(0, deg(D) - 1), either raise NonElementaryIntegralException, in
      which case the equation ``Dq + b*q == c`` has no solution of degree at
      most n in k[t], or a solution q in k[t] of this equation with
      ``deg(q) < n``.
      """
      q = Poly(0, DE.t)
  
      while not c.is_zero:
          m = c.degree(DE.t) - b.degree(DE.t)
          if not 0 <= m <= n:  # n < 0 or m < 0 or m > n
              raise NonElementaryIntegralException
  
          p = Poly(
              c.as_poly(DE.t).LC() / b.as_poly(DE.t).LC() * DE.t**m,
              DE.t,
              expand=False,
          )
          q = q + p
          n = m - 1
          c = c - derivation(p, DE) - b * p
  
      return q
  
imports: from operator import mul
  from functools import reduce
  from sympy.core import oo
  from sympy.core.symbol import Dummy
  from sympy.polys import Poly, gcd, ZZ, cancel
  from sympy.functions.elementary.complexes import im, re
  from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.integrals.risch import gcdex_diophantine, frac_in, derivation, splitfactor, NonElementaryIntegralException, DecrementLevel, recognize_log_derivative
label_desc: Use image node_id 8 for calling a global function with example usage: no_cancel_b_large(b, c, n, DE) and returns: q