Images. Use the image tags.
After uploading it somewhere - I use
tinypic, copy the code they give you.
Like this
[img]http://www.housecatscentral.com/cat1.jpg[/img]
Will give
If you want to size it, use the height or width command
[img height=200]http://www.housecatscentral.com/cat1.jpg[/img]
to give
As for equations, there is no facility at this time despite promises of a software upgrade of this nature for some time now. All you can do is use the sup and sub tags to create superscript and subscript text.
Example.
g=9.81m/s
2Or v
1=v
2+v
3For additional help, google 'bb code' and look at sites like
http://docs.simplemachines.org/index.php?topic=57.0Now, can you do something for us? Please make an effort to post in the appropriate forum. This is obviously a place to talk about earth's shape. Not how to use a computer.