You may sometimes want to write mathematical expressions in your forum posts.
When you write a forum post, you should find that there is a toolbar just above the space where you type.
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The Special Characters button on this toolbar allows you to add many useful mathematical characters to your post.
For more complicated mathematical expressions, you can use the DragMath button . This allows you to build up mathematical expressions using templates.
Please note that DragMath requires Java, and you may find that it is blocked by security settings.
For example, this is how you would construct the quadratic formula using DragMath:
 
 
 
 
 

Click Insert. The equation will then appear in your post in TeX form  it won't look anything like your equation at this stage, but don't worry, it will appear correctly when you submit your post.
Note that when you receive a forum post by email, the DragMath expression will probably appear as a red cross. Clicking Download pictures should make it display correctly. However, any users who have chosen in their Profile to receive emails in plain text format rather than HTML will see the TeX version of the equation and will only be able to view the equation in its correct form by going into the forum itself to view the post.