On the answer screen editor when posting, you will see 'Formats'. Then, go to 'Inline' followed by 'superscript.' Once, you are done with the superscript, click it again to go back to normal.
On the answer screen editor when posting, you will see 'Formats'. Then, go to 'Inline' followed by 'superscript.' Once, you are done with the superscript, click it again to go back to normal.