Thanks, but "as normal" appears not to work. The "Sigma" icon does not show next to the YouTube icon on the menu so I cannot initialize LateX. If I try to enter LateX code without using the convenience of the drop down menu, when I hit "preview", I don't see what I put in. Instead, I see the last stuff I put in when I helped someone with homework. It seems that the LateX icon is turned on for some classes of threads such as homework help but not others such as this one or the blogs. Am I missing something? Please advise. Thanks.
LaTex previews can act funny at Physics Forums, that is not unusual. But after you submit the post or blog, and perhaps refresh the browser screen too, LaTex should display properly.
IIRC, there might be a problem with LaTex in Comments to blogs. But it does (or should) work in the blog itself.
Thank you all for you comments and suggestions. I feel uneasy posting LateX code without the benefit of preview. I think I will create the LateX where preview is available and then just cut and paste into the blog.