We need goldmark katex entension which is not yet we have: 
[https://github.com/gohugoio/hugo/issues/6544](https://github.com/gohugoio/hugo/issues/6544)
Mathematical notation in a Hugo project can be enabled by using third party JavaScript libraries.
In this example we will be using KaTeX
- Create a partial under 
/layouts/partials/math.html - Within this partial reference the Auto-render Extension or host these scripts locally.
 - Include the partial in your templates like so:
 
{{ if or .Params.math .Site.Params.math }}
{{ partial "math.html" . }}
{{ end }}
- To enable KaTex globally set the parameter 
mathtotruein a project’s configuration - To enable KaTex on a per page basis include the parameter 
math: truein content files. 
Note: Use the online reference of Supported TeX Functions
Examples
Inline math: $$ \varphi = \dfrac{1+\sqrt5}{2}= 1.6180339887β¦ $$
Block math:
$$
\varphi = 1+\frac{1} {1+\frac{1} {1+\frac{1} {1+\cdots} } }
$$