You can choose symbols, Greek letters, and operators from the math symbol dropdown lists in the Show Work Window:
             
        
To enter a symbol:
The symbol appears in the entry box.
You also can access symbols by choosing Insert > Symbol from the menu and selecting your symbol from the popup window.
You can move your mouse over a dropdown list to get a tooltip that shows you what kinds of symbols it contains.
| Operators | Set operators | Symbols | Lower-case Greek letters | Upper-case Greek letters | Currency | 
|---|---|---|---|---|---|
|   |   |   |   |   |   | 
See also: