code: def _translate_symbols(string):
      
      res = []
      for s in re.split(r'([,.:\s=]+)', string):
          tex_str = _TEX_GREEK_DICTIONARY.get(s)
          if tex_str:
              res.append(tex_str)
          elif s.lower() in greek_letters_set:
              res.append("\\" + s.lower())
          elif s in other_symbols:
              res.append("\\" + s)
          else:
              if re.match(r'^[a-zA-Z]{4,}$', s):
                  res.append(r'\text{' + s + '}')
              else:
                  res.append(s)
      return "".join(res)
docs: Given a description of a Greek letter or other special character,
      return the appropriate latex.