code: public static ScientificNumberFormatter getMarkupInstance(
               DecimalFormat df,
               String beginMarkup,
               String endMarkup) {
           return getInstance(
                   df, new MarkupStyle(beginMarkup, endMarkup));
       }
docs: Gets a ScientificNumberFormatter instance that uses
  markup for exponents.
  @param df The DecimalFormat must be configured for scientific
  notation. Caller may safely change df after this call as this method
  clones it when creating the ScientificNumberFormatter.
  @param beginMarkup the markup to start superscript e.g {@code <sup>}
  @param endMarkup the markup to end superscript e.g {@code </sup>}
  @return The ScientificNumberFormatter instance.