Hello, I want to ask a question about writing a tutorial. I tried to post a blog in Codeforces many times, but I can't use the LaTeX formula rendered by MathJax normally, and the system will automatically replace it with a picture.

I found that the formulas in many of the contest's tutorials are rendered using MathJax (e.g. Codeforces Round #532 (Div. 2) — Editorial), so I wanted to know how I could do this. In addition, I saw the input box for the tutorial in the problem statement in polygon, but I don't know how to display this tutorial.

I hope I can get your guidance, thank you.