How can I fix messed up LaTeX in my old posts?

[Fredrik]

I noticed that the LaTeX in one of my old posts is messed up. The problems start with this piece:

##C:(a,b)\to \mathbb R^4##

The result should look like this:

$C:(a,b)\to \mathbb R^4$

But instead it looks like this:

$C:(a,b)\to \mathbb R^4$.

Actually it's even worse. The 4 is on a new line, and the rest of the paragraph is messed up even worse. https://www.physicsforums.com/threads/active-and-passive-lorentz-transformation.679890/#post-4316036

Is there a better fix for this than to use "plain" tags as I did above?

 

[Greg Bernhardt]

I'll look into switching the smilie codes

 

[mfb]

Did you change something? The two lines in Fredrik's post look exactly the same here (apart from the period at the end).

 

[Greg Bernhardt]

Did you change something? The two lines in Fredrik's post look exactly the same here (apart from the period at the end).

yeah I changed some smilie codes

 

[Fredrik]

Thanks Greg.

For those who found this thread after Greg made the change: There was a sad smiley after the C. In the thread I linked to, the 4 after the ^ appeared on a new line, and then the rest of the paragraph was messed up. Some plain text was interpreted as LaTeX and some LaTeX was interpreted as plain text.