code: def test_negative_multiplication(self):
      statement = Statement(text="What is -105 * 5")
      response = self.adapter.process(statement)
      self.assertEqual(response.text, "-105 * 5 = -525")
      self.assertEqual(response.confidence, 1)
  
imports: from tests.base_case import ChatBotTestCase
  from chatterbot.logic import MathematicalEvaluation
  from chatterbot.conversation import Statement
label_desc: Use image node_id 14 for calling the MathematicalEvaluationTests obj's underlying member method code with example usage: obj.test_negative_multiplication() without return types