Multiplication symbol?

I installed wordpress a few days ago and have been very happy with it. I was using a pretty much self written PHP site before that that I no longer have time to update. I wrote a script to port all my posts over to the WP database. I noticed however that in my title instead of it reading Jared0x90 it reads Jared0(multiplication style x)90. It seems like WordPress is trying to pickup a math equation and insert the multiplication symbol between the 0 and the 9 where it is actually supposed to be just an x as it is expressing hexidecimal. Is there a setting to turn this off easily? I looked in the database and it is stored as Jared0x90 so it must be happending in the code somewhere. Thanks for your help.