# Latex code is not working in preview? [duplicate]

Latex code is not working in preview so i am asking a question to see if it really works.

\frac{a}{b}

## marked as duplicate by Joseph Wright♦Apr 6 '17 at 18:47

• Welcome to TeX.SE. \frac{a}{b} is just a code fragment. I see no reason to expect it to do anything at all. Please be a lot more specific as to what you've tried so far; a claim such as "code is not working in preview" is simply not actionable. Also, please do explain what you set the tag "latex3". Separately, you may wish to peruse the information available in the posting What are good learning resources for a LaTeX beginner? – Mico Apr 6 '17 at 18:17