Let me see. Does

work? Apparently it does now. It appears imperative to leave a single space between the square bracket tex wraps and the formula, term or statement, otherwise problems will develop. Also, it is probably a good idea to preview your

work in a true

environment before posting it if it is a complicated expression. I notice unpredictable results when making errors, such as a huge preview panel that extends far beyond the sides of the screen and a very large empty selection block that appears in the editing window where the wrong code is entered.
I could assume that the

as printed is already stored in the database and that is why it is displaying properly. So then apparently the expression
is not, since it doesn't. But
is. I could be assuming the wrong thing. But why can't I display Einstein's famous equation?