Just type in a single TeX formula without any leading and trailing signs, like this: a+b=c
You will be given a permanent URL that will generate this formula each time it is loaded.
It's absolutely compatile with any browser and requres NO client software!
If you have any problems with plainTeX syntax, please, read the TeX Cookbook!
If you don't know something about LaTeX syntax, the LaTeX Symbols Manual and Learn LaTeX are what you want!
Special notice: The \lambdabar keyword draws the symbol in LaTeX only!
Don't forget to spread the revolution!
Just paste in a whole image tag or its address...