code: def test_addn(self):
      x = random_ops.random_uniform([2, 3, 5])
      y = random_ops.random_uniform([3, 5])
      z = random_ops.random_uniform([3, 5])
  
      def loop_fn(i):
          x1 = array_ops.gather(x, i)
          return math_ops.add_n([x1, y, z])
  
      self._test_loop_fn(loop_fn, 2)
  
imports: import itertools
  from absl.testing import parameterized
  from tensorflow.python.eager import backprop
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import clip_ops
  from tensorflow.python.ops import linalg_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import nn
  from tensorflow.python.ops import random_ops
  from tensorflow.python.ops import special_math_ops
  from tensorflow.python.ops import tensor_array_grad
  from tensorflow.python.ops.parallel_for import control_flow_ops
  from tensorflow.python.ops.parallel_for.test_util import PForTestCase
  from tensorflow.python.platform import test
label_desc: Use image node_id 10 for calling the MathTest obj's underlying member method code with example usage: obj.test_addn() and returns: math_ops