The number of combinations of p distinct items taken q at a time is denoted: Cₚꟷ
Now the same with markup: Cpq
Pecita Times Arial Gentium Verdana Ubuntu
Firefox is now able to process variants. It's very interesting! However, the experience of this support made me understand that it did not eliminate the need for a standard location to store the superscript small letter q and the Small Caps Q and X. These are indeed basic glyphs and their places are not in Private Area.