I've tried this, but it didn't work.
Also tried using Markdown, although it only works when you're writing a message (not once you've sent it).
[Tex/LaTex] use LaTex in WhatsApp?
markdownmathjaxrendering
Related Solutions
Welcome to TeX.SE. Don't use square brackets [] in your math expression. Use braces {} only. You wrote: $\xrightarrow[\text{sample text}]$. It should be: $\xrightarrow{\text{sample text}}$.
Edit: Updated to show the use of \Bracket and \Set from the braket package.
---
title: "Title"
author: "Me"
header-includes:
- \usepackage{array}
- \usepackage{booktabs}
- \usepackage{mathtools}
- \usepackage{braket}
output:
pdf_document:
keep_tex: true
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```
\hrule <!-- draw a horizontal line -->
We can _write_ in **markdown** and add content that uses ``LaTeX`` syntax and \LaTeX\ packages to format our document.
## Using ``mathtools`` package
$\xrightarrow{\text{sample text}}$
<br> <!-- add space, like \bigskip % - this is a comment -->
## Using ``array``, ``booktabs`` and ``braket`` packages
\begingroup
\renewcommand*{\arraystretch}{1.7}
\setlength{\tabcolsep}{10pt}
\begin{tabular}{@{}>{\footnotesize}r>{$\displaystyle}l<{$}@{}}
\toprule
\verb+\Braket{ \phi | \frac{\partial^2}{\partial t^2} | \psi }+ & \Braket{ \phi | \frac{\partial^2}{\partial t^2} | \psi } \\
\verb+\Set{ x\in\mathbf{R}^2 | 0<{|x|}<5 }+ & \Set{ x\in\mathbf{R}^2 | 0<{|x|}<5 } \\
\bottomrule
\end{tabular}
\endgroup
## We can do math
```{r math}
result <- 1 + 2
result
```
If you need a command line tool to convert markdown to pdf or html, then pandoc might be a good candidate. You simply call:
$ pandoc infile.md -o outfile.pdf
or
$ pandoc infile.md -o outfile.html
to generate the desired output.
You can configure the process, if desired. For math in html, you could choose different rendering options, like --mathjax or --mathml. If you need embedded pictures, use --webtex. This is all documented in the manual: https://pandoc.org/MANUAL.html#math-rendering-in-html
Best Answer
Whatsapp Web doesn't render mathjax. Even if some browser plugin renders it for you, the user at the receiving end would also need it. And if the receiver is using mobile app, it is not going to work.