brian, you can click on the math, or just hover the mouse over it and see what the code that went into it was (its quite nifty )

my bad on not posting the code, ooopsie

sout seems to have formatting issues in the math mode, you can see that it works with text mode by

[math]\text{\sout{this is crossed out!!!}} \sout{and this is not}[/math]

[math]\text{\sout{this is crossed out!!!}} \sout{and this is not}[/math]

math though has a \cancel command that is meant to do just that, so you can do [math]\cancel{lalalala}[/math]

[math]\cancel{That's exactly what I need!}[/math]

Thank you again.