[OS X TeX] A little help needed (math formula problem)

[Joe Java]

Sorry to respond to myself, but just found the answer to be
the "/raisebox" command.
 
> Now I want to position the zero vertically.
> 
> How do I adjust one character up or down (vertical alignment),
> without moving any other characters?

Thanks for all the help! I should be able to carry on from here.

If anyone has any suggestions or comments on the code used in the
webpage please feel free to send them to me.