Beautiful equations on the forum are created using LaTeX, a language commonly used in scientific writing. Users can learn by referencing a guide available on the forum or by clicking on other users' equations to view the TeX code. For testing equations before posting, the preview post feature is recommended, although downloading a compiler is another option for more extensive use. Posting equations directly and editing them afterward is also suggested for quick adjustments. Mastering LaTeX can significantly enhance the presentation of mathematical content in discussions.