What is the current Unicode stance on subscripts and superscripts for mathematical use?

[Marius Spix]

This can already be done by rich text. Unicode includes some
superscript characters like ², ³ or ° (the degree sign is a superscript
version of the white circle U+25CB) for compatibility with legacy
character sets and phonetic transcriptions (in some languages the tone
is important). Unicode’s superscript characters are very limited and
nested superscript is not supported at all. For some units and common
chemical terms which often appear in plain text in non-scientific
contexts (like m³, kg·m/s², °C, CO₂ or Na⁺) the Unicode superscript
characters are sufficient, however.

On Mon, 22 Jun 2020 23:22:46 +0200
Hans Åberg via Unicode <unicode at unicode.org> wrote:

> 
> > On 22 Jun 2020, at 20:45, Doug Ewell via Unicode
> > <unicode at unicode.org> wrote:
> > 
> > Sorry, sent to wrong list.
> 
> I use, for text file input (plain UTF-8), Unicode subscript and
> superscript parentheses as subscript and superscript delimiters, like
> in 𝑃₍𝑥₎, 𝑨⁽𝒙⁾. It would be nice to have such subscript and
> superscript delimiters that provide the corresponding rendering in
> the text editor.
> 
> 
>