To write the equations. Now you will be writing equation of a linear model. When I write something in the mentioned link it has 3 options Web Page Forum Twitter Google Docs.
The Html file is written to the folder where the markdown file resides in.
Have you ever asked yourself how they write complex maths and physics equations using computer. However rendering math inside Markdown require third. The Jupyter Notebook uses MathJax to render LaTeX inside HTML Markdown. Now write a little bit of text.