code: def polynomial5(x):
      """Polynomial function with 5 roots in the [-1, 1] range."""
      return 63 * x**5 - 70 * x**3 + 15 * x + 2
  
imports: import math
  import tensorflow.compat.v2
  import tf_quant_finance
  from tensorflow.python.framework import test_util
  from tf_quant_finance.math.root_search import utils
label_desc: Use image node_id 1 for calling a global function with example usage: polynomial5(x) and returns: unknown