code: def test_get_boxed_answer(self):
      TEST_CASES = [
          TestCase(
              "Closed bracket before open bracket",
              "sum_{p = 1981}^{2007} 45 \\\\\n&= 2 \\sum_{k = 1}^{44} k^2 + 27 \\cdot 45 \\\\\n&= 2 \\cdot \
                      \\frac{44 \\cdot 45 \\cdot 89}{6} + 27 \\cdot 45 \\\\\n&= \\boxed{59955}.\n\\end{align*}",
              "59955",
          ),
          TestCase("Common case", "boxed{59955}", "59955"),
      ]
      parser = MathDatasetStepByStepReasoningTeacher.add_cmdline_args(
          ParlaiParser(False, False), None
      )
      opt, _ = parser.parse_and_process_known_args()
      opt["datatype"] = "train"  # arbitrary
      teacher = MathDatasetStepByStepReasoningTeacher(opt)
  
      for case in TEST_CASES:
          clean_answer = teacher.get_boxed_answer(case.dirty_answer)
          self.assertEqual(
              clean_answer,
              case.clean_answer,
              f"Text different in {case.name}",
          )
  
imports: import unittest
  from parlai.core.params import ParlaiParser
  from dataclasses import dataclass
label_desc: Use image node_id 1 for calling the TestMathDatasetStepByStepReasoningTeacher obj's underlying member method code with example usage: obj.test_get_boxed_answer() without return types