You can now just talk to g(Math) to create math expressions!! Using Google Chrome, click on the mic icon and start talking. Using the keywords outlined here, g(Math) will interpret the math you speak and convert it to LaTeX, which you can insert directly into your Doc. 

1. Click on the mic icon. (The first time you do this it will ask you to allow the mic). Start talking!!

2. g(Math) will translate what you are saying using the math keywords and fill the LaTeX box with the math interpretation, this will automatically update the LaTeX Preview image. 

3. Click the Insert button to insert the image at your cursor in the Doc.

Below is an example where I spoke: "y equals fraction one half over two stop x plus 15":