code: def _clean_steps(self, steps: str) -> str:
      steps = steps.replace("\n\n", "\n")
      steps = steps.replace("$$", "$ ")
      steps = steps.replace("\n", ". ")
      steps = steps.replace(".$", "$. ")
      steps = steps.replace("..", ".")
      steps = steps.replace(",$", "$,")
      steps = steps.replace(". . ", ". ")
  
      return steps
  
imports: import glob
  import json
  import os
  import random
  import re
  from parlai.tasks.math_dataset.build import build
  from parlai.core.opt import Opt
  from parlai.core.params import ParlaiParser
  from parlai.utils.io import PathManager
  from typing import List, Optional
  from parlai.tasks.reasoning.agents import MWPStepsReasoningTeacher
label_desc: Use image node_id 5 for calling the MathDatasetStepByStepReasoningTeacher obj's underlying member method code with example usage: obj._clean_steps(steps) and returns: steps