It’s not standard feature. By using JetPack plugin I can use latex codes in my posts and pages (LaTeX is a markup language for writing complex mathematical equations, formulas, etc.). But if I write this latex codes as an answer to the watu it doesn’t work. I don’t know how can I solve this. Maybe the [watu] should inherit the page’s or post’s function (to allow the [latex][/latex] bb code or $latex code$ code).