Hola, Robert. There is no way to do MathJax here because this forum is developed in WordPress. You could look up plugins for wordpress, but I’m very hesitant to add anything that would slow down the performance of the forum, as wordpress is (to my knowledge) an interpretive language and benefits from the speed of modern computers. If you tried to run this forum in 1980 it would grind to a halt.
“tags” — what kind of tags?
Anyway, back to Mathjax. If you can give an example, maybe we can help. If you can produce an image as a png or a gif or a jpeg you can upload it in a thread here. Hope this helps.