code: def test_divide(self):
      f, g = self.f, self.g
  
      self.check_constant_output(f / g, 3.0 / 2.0)
  
      self.check_constant_output((2 / f) / g, (2 / 3.0) / 2.0)
      self.check_constant_output(
          2 / (f / g),
          2 / (3.0 / 2.0),
      )
      self.check_constant_output(
          (f / 2) / g,
          (3.0 / 2) / 2.0,
      )
      self.check_constant_output(
          f / (2 / g),
          3.0 / (2 / 2.0),
      )
      self.check_constant_output(
          (f / g) / 2,
          (3.0 / 2.0) / 2,
      )
      self.check_constant_output(
          f / (g / 2),
          3.0 / (2.0 / 2),
      )
      self.check_constant_output((f / f) / f, (3.0 / 3.0) / 3.0)
      self.check_constant_output(
          f / (f / f),
          3.0 / (3.0 / 3.0),
      )
      self.check_constant_output(
          (f / g) / f,
          (3.0 / 2.0) / 3.0,
      )
      self.check_constant_output(
          f / (g / f),
          3.0 / (2.0 / 3.0),
      )
  
      self.check_constant_output(
          (f / g) / (f / g),
          (3.0 / 2.0) / (3.0 / 2.0),
      )
      self.check_constant_output(
          (f / g) / (g / f),
          (3.0 / 2.0) / (2.0 / 3.0),
      )
      self.check_constant_output(
          (g / f) / (f / g),
          (2.0 / 3.0) / (3.0 / 2.0),
      )
      self.check_constant_output(
          (g / f) / (g / f),
          (2.0 / 3.0) / (2.0 / 3.0),
      )
  
imports: from itertools import permutations
  from operator import add, ge, gt, le, lt, methodcaller, mul, ne, sub
  from string import ascii_uppercase
  from unittest import TestCase
  import numpy
  from numpy import arange, array, eye, float64, full, isnan, zeros
  from pandas import DataFrame, date_range, Int64Index
  from catalyst.pipeline import Factor, Filter
  from catalyst.pipeline.expression import NumericalExpression, NUMEXPR_MATH_FUNCS
  from catalyst.testing import check_allclose
  from catalyst.utils.numpy_utils import datetime64ns_dtype, float64_dtype
label_desc: Use image node_id 14 for calling the NumericalExpressionTestCase obj's underlying member method code with example usage: obj.test_divide() without return types