docs: protected List<EquPart> multiplize(final List<EquPart> oldTokens)
      {
          final EquPart[] equParts = oldTokens.toArray(new EquPart[0]);
          final EquPart[] fixed = new EquPart[equParts.length * 2];
          /*
           * )(, operand (, operand operand, operand function, ) operand, )
           * function
           */
          fixed[0] = equParts[0];
  
          EquPart m;
          int left = 0;
  
          for (int right = 1; right < equParts.length; right++)
          {
              if (fixed[left].multiplize(equParts[right]))
              {
                  m = new OpMultiply(fixed[left]);
                  left++;
                  fixed[left] = m;
              }
  
              left++;
              fixed[left] = equParts[right];
          }
  
          final List<EquPart> tokens = new ArrayList<>();
  
          for (int i = 0; i < fixed.length; i++)
              if (fixed[i] != null)
                  tokens.add(fixed[i]);
  
          return tokens;
      }