First of all, we write in Markdown style, which is used in web as an extra layer. It is later gets converted into raw html, but you can always write in pure html and it most likely will work as well. More about Markdown and more detailed tutorials you can find这里, 和这里.
Trick: is always useful to copy and paste from an existingtheory page! click "Edit" on the right side panel to see the html code.
[glucose](wiki:/glucose)
glucose
[Labster](labster.com)
Labster


**Figure 1:** The most common isoform of fructose is a five-membered ring.

Figure 1:The most common isoform of fructose is a five-membered ring.
https://s3.amazonaws.com/labsterim/media/videos/pre/swirling%20bottles.ogv.
Please note that dots represent a number of spaces required for intending.
1. First ordered list item 2. Another item ⋅⋅⋅⋅⋅* Unordered sub-list (5 spaces). ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅* Each next level is 5 more spaces ⋅⋅⋅⋅⋅- You can also use - for bullet points ⋅⋅⋅⋅⋅+ Or you can use + 1. Actual numbers don't matter, just that it's a number ⋅⋅⋅⋅⋅3. Ordered sub-list 4. And another item.
第1列|第2栏--- |---
| Column 1 | Column 2 |
|---|---|
| Column 1 | Column 2 | Column 3 | | :------- | :------: | -------: | | Default is left-aligned | I am centered! | I go to the right |
| Column 1 | Column 2 | Column 3 |
|---|---|---|
| 默认为左对齐 | I am centered! | I go to the right |
*Italics* or _Italics_
**Figure 1:** or __Figure 1:__
***Your text***
#H1
##H2
###H3
Or you can use dashes===================
New section---------------
Top part
Bottom part
Top part
---------------Bottom part
Subscript:
H~2~OH2O
H2O
^32^P32P
32P
The simplest solution is to use a link to an image generated bycodecogs.com动态地。

The same way you theoretically can use any LaTeX formula, however, please be advised about服务的许可和使用
UPDATE
You can use HTML and styles directly on you theory page for displaying both sub- and superscripts using the following syntax:
Place this once on the page: