Write LaTeX using MathJax
Enable MathJax
Put the following lines after the header ( <head> ) in the Tumblr theme (Edit appearance → Edit Theme → Edit HTML):
Version 2 configuration:
<script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"> MathJax.Hub.Config({ extensions: ["tex2jax.js","TeX/AMSmath.js","TeX/AMSsymbols.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true, processEnvironments: true, processRefs: true }, "HTML-CSS": { availableFonts: ["TeX"] } }); </script>
Version 3 configuration:
<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script> <script type="text/javascript" id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script> <script> window.MathJax = { tex: { inlineMath: [ ['$','$'],['\\(','\\)'] ], displayMath: [ ['$$','$$'], ['\\[','\\]'] ], processEscapes: true, processEnvironments: true, processRefs: true }, options: { ignoreHtmlClass: 'tex2jax_ignore|editor-rich-text' } }; </script>
Here on my site, I am using this latest version 3 configuration.
Write $\mathrm\LaTeX$
Inline math:
Input: $E^2=m^2c^4 + p^2c^2$
Output: $E^2=m^2c^4 + p^2c^2$
Display math:
Input: $$\displaystyle R_{\mu\nu}-\frac{1}{2}R\,g_{\mu\nu} + \Lambda\,g_{\mu\nu} = \frac{8\pi G}{c^4}T_{\mu\nu}$$
Output: $$\displaystyle R_{\mu\nu}-\frac{1}{2}R\,g_{\mu\nu} + \Lambda\,g_{\mu\nu} = \frac{8\pi G}{c^4}T_{\mu\nu}$$
Resources
https://webapps.stackexchange.com/q/13053/196564
https://tex.stackexchange.com/a/13868/114006
https://irrep.blogspot.com/2011/02/mathjax-in-blogger.html
https://docs.mathjax.org/en/v2.7-latest/options/preprocessors/tex2jax.html
https://docs.mathjax.org/en/latest/web/start.html#ways-of-accessing-mathjax
https://docs.mathjax.org/en/latest/web/configuration.html#converting-your-v2-configuration-to-v3
https://mathjax.github.io/MathJax-demos-web/convert-configuration/convert-configuration.html
https://github.com/daattali/beautiful-jekyll/issues/195