title: How can I insert mathematical formulas into a markdown file with visual studio code?
body: <p>I have used vscode to write markdown-file for several months, and it is a
  perfect tool. <br>
  But how can I insert <strong>mathematical formulas</strong> into a markdown file with Visual Studio Code? <br>
  I can not find an effective solution by Google search. Does vscode support?</p>