code: def assert_sympy_expressions_equal(expr1, expr2):
      
      if not sympy_expressions_equal(expr1, expr2):
          raise AssertionError("{0!r} != {1!r}".format(expr1, expr2))
docs: Raises `AssertionError` if `expr1` is not equal to `expr2`.
  
      :param expr1: first expression
      :param expr2: second expression
      :return: None