[O] How to insert fraction and other math inside tables?

[Hans Bale]

How do I insert eg. \frac{1}{2} inside a table?

Following does not seem to work

|text       |some more text|
|-----------+--------------|
|\frac{1}{2}| \frac{1}{3}  |


Exporting to html, the .html it is displayed as:  
           
|text       |some more text|
|-----------+--------------|
|\frac{1}{2}| \frac{1}{3}  |


Enclosing with \( ... \) does not work properly, after exporting the .html shows

|text       |some more text|
|-----------+--------------|
|           |              |