Where is the Tool Box?

1. Jul 18, 2012

Darwin123

I want to display complex equations. It was suggested to me that I click on the sigma icon in the Toolbox. However, I can't find the Toolbox.
I see the quick symbols box. However, underneath there is a suggestion to look for the sigma icon. I don't see a sigma even in the quick symbols box.
I don't have a LaTex word processor.
Does the forum provide a LaTex editor?
Where is the Toolbox?

2. Jul 18, 2012