So I'm posting it here. I know it would be pretty dumb to add the sub/sup tags for bbcodes, etc. But can't you simply enable html use of those two? I know in phpBB I can enable html and control what tags people can/cannot use. It is this way I added strikethrough <s> <strike> without having to edit the bbcodes.
Html used to be enabled for regulars but yoshi disabled it when we switched to version 4 (or whatever version this is).
Maybe its changed since then. it was [dohtml]
There are now sub and sup tags
H[sub]2[/sub]O
10[sup]600[/sup]
Look in the bb codes help for more details.
[sub]B[/sub][sup]e[/sup][sub]e[/sub][sup]R[/sup][sub]T[/sub][sup]e[/sup][sub]s[/sub][sup]t[/sup]
NaOH + HCl = NaCl + H[sub]2[/sub]O
Now I can write my chemical equations with ease.