code: def full_simplify(expr, simplify_fns=_simplify_fns):
      while True:
          did_something = False
          for fn in simplify_fns:
              did_something_i, expr = fn(expr)
              did_something = did_something or did_something_i
          if not did_something:
              break
      return expr
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import tensorflow
label_desc: Use image node_id 5 for calling a global function with example usage: full_simplify(expr, simplify_fns) and returns: expr