code: def format(self, **kwargs):
          
          name = self.name.format(**kwargs)
  
          subs = []
          if self.sub is not None:
              subs = [self.sub.format(**kwargs)]
          supers = []
          if self.sup is not None:
              supers = [self.sup.format(**kwargs)]
  
          return render_unicode_sub_super(
              name, subs, supers, sub_first=True, translate_symbols=True,
              unicode_sub_super=self.unicode_sub_super)
docs: Format and combine the name, subscript, and superscript