Drawing within Docs on iPad Pro

I LOVE Google Docs. BUT I am a math teacher and I desperately need to draw FREEHAND with my Apple Pencil within the Google Docs app. It is truly frustrating having to download my Docs as Word files and use the Word app to draw on the document and re-upload to Drive. Heaven forbid I need to edit my drawing! PLEASE PLEASE PLEASE enable a drawing tool within the Google Docs app!!!

ClassyMath about Google Docs, v1.2018.062