We have all been frustrated with the fact that we couldn't type math equations in Google Docs. Well, the answer to our prayers is here! g(Math) is an new "add-on" for Google Docs. Simply open up a new Google Document, click on add ons and search for g(math). Add it to your Google Docs and you will have it available for every Google Doc you decide to use it in. Check this video created by +Jeremy Bell he does very good job at explaining how to use it.
Happy algebraic writing!