doesn't work for me. I don't have the most standard setup using Tor Browser, but I don't think I have anything blocked and while symbols do dance around they do not form an image.
I figured it out. It's the anti fingerprinting randomization of canvas data that destroys the image. Though, if it gets drawn on a canvas, is that really MathML?
Edit: I have looked some more into it. It's actually MathML and it seems to trace a video in real time. Somewhere in there is a canvas although I cannot find it in the element inspector.