Jousef,
This is strange, in your reply of Post 4, I see the beautiful formula.
In posts 1 and 2, I only see the embedded code where the nice formula should be ???
Especially Post 1 should show up correctly, should it not?
I will try your suggestion.
Dale
x = {-b \pm \sqrt{b^2-4ac} \over 2a}
AHA, new lines for each $$ was the key!!!
Perhaps the first post could be fixed (and maybe the tensor/matrix notion there too) 