Superscripts are most commonly used to denote powers, eg \(4^3=64\).
Superscripts are also commonly used to mark footnotes. If there is a footnote about a number, this can lead to an ambiguity, for example: there are 47 pages on this wiki. (Wiki styling puts square brackets around this reference, making this less ambiguous, but this is not always the case elsewhere.)
- But there are some other common uses of superscripts, see eg powers of trigonometric functions.
- This number is a guess, I didn't count them.