code: def test_error_if_new_variable_names_not_permitted(_variables):
      with pytest.raises(ValueError):
          MathFeatures(
              variables=["Age", "Name"],
              func=["sum"],
              new_variables_names=_variables,
          )
  
imports: import numpy
  import pandas
  import pytest
  from sklearn.pipeline import Pipeline
  from feature_engine.creation import MathFeatures
label_desc: Use image node_id 4 for calling a global function with example usage: test_error_if_new_variable_names_not_permitted(_variables) without return types