A comma in subscripts and superscripts sometimes is omitted; it is also ambiguous notation. Source: Internet
A further complication is the use of numeric superscripts to distinguish neighboring stars that Bayer (or a later astronomer) labeled with a common letter. Source: Internet
Descartes introduced the use of superscripts to denote exponents as well. Source: Internet
For each of these key components he provides a letter designation (with superscripts to designate specific subtypes). Source: Internet
He also "pioneered the standard notation" that uses superscripts to show the powers or exponents; for example, the 4 used in x 4 to indicate squaring of squaring. Source: Internet
In cases where the set of indexing numbers is understood, the subscripts and superscripts are often left off. Source: Internet