Formatting Stage Five
If the image is on this web site you can just put "IMG:" followed by the name of the image file.
You can include equations - see the Maths Mode page for more details.
All the formatting is demonstrated on that page and on the Test Page. To see how to achieve a particular effect, click on the "Edit This page" link at the top right or bottom of the page and look at the plain text version.
Above all, content is everything!
You might also want to see how we go about creating pages.