code: def test_FreeGroup__getitem__():
      assert F[0:] == FreeGroup("x, y, z")
      assert F[1:] == FreeGroup("y, z")
      assert F[2:] == FreeGroup("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 5 for calling a global function with example usage: test_FreeGroup__getitem__() without return types