Showing work on the phone app

So when using the phone app I have noticed that when doing math you can't write out your work like on the computer this can make it much more difficult to use the app because due to this you have to either do it all in your head (which most teachers disapprove of) or pull up the phone's calculator or notepad (which feels like your cheating because it isn't part of the app) so I think they should add the ability to show your work for math problems when your on the phone because that will both improve the app and make it easier to use