Is there any plan to support mathematical expressions?
Github recently started supporting mathematical expressions.
Is there any plan for this package to support these changes?
I love this new support. So cool.
Unfortunately, I don't think we can support a syntax which is unspecified. The article you reference links (rather coyly) to the GFM spec, which does not specify the mathematical expressions syntax. The source text hasn't really been changed in years either.
To add support, we'd need a solid suite of tests that ensure we match what GitHub parses. I can't even find references to this new syntax in their repo...
Thinking about it more, it could just be a front-end feature, that github.com includes. Meaning the rendered content sent to the browser includes dollar signs, etc. Then MathJax comes out and replaces that text with something else.
So this would be up to the page where you are rendering the markdown-generated HTML. If you want this support on Dart package documentation, file an issue with dartdoc. If you want this support on a Dart package README and CHANGELOG, file an issue with pub-dev.