I'm having trouble with the LaTex generator on your site. If I try to enter a slightly corrected line of LaTex in the process of correcting the equation, your site allows maybe 2 or 3 corrections and then ignores any further submissions, repeating the same symbols even though I errased the LaTex portion of those symbols. I find this extremely annoying. If that is your intend to prevent abuse, then please have the system tell you this with a warning message. Perhaps I over used the system when trying repeatedly to have it print out "b [tex]\sigma[/tex] t ", where sigma is the greek letter and t is the english letter. No matter what I seem to try the system does not want to print out a two letter subscript consisting of one sigma and one letter t. Would appreciate a little help here. Other than that, thank you ever so much for providing an easy code for generating math. Thanks.