code: def test_FreeGroupElm__hash__():
      assert hash(x * y * z)
  
imports: from sympy.combinatorics.free_groups import free_group, FreeGroup
  from sympy.core import Symbol
  from sympy.testing.pytest import raises
  from sympy.core.numbers import oo
label_desc: Use image node_id 6 for calling a global function with example usage: test_FreeGroupElm__hash__() without return types