I see. Although you don't have to "upload", In case of lio's calculation, all I had to do was to copy the code into a wiki page, add <math> tags, and it complied flawlessly (then you can copy the image codes), which is why I wondered if maybe you use a tool that generates the code.
It seems a bit strange to me, because I don't find TeX sourcecode pretty to look at, and isn't it easier to say SR(4) than \sqrt{4}?