Can you see this? I can only do squared and cubed. The superscript function in my word processing does not seem to translate to Golden Skate.
In your word processing program, click on "insert symbol." Then scroll through your various fonts until you find one that has this little two and little three. (On mine I have it on the symbol page for the Tahoma font, for instance.) Then copy and paste it from a word processing file to the GS dialogue box.
I think that the reader has to have the same font available to see it.