How to determine if a function is a polynomial

This app is amazing I was having trouble in math at school and this app helped me alot, and the way of how fast it gives you the answer is just amazing. I use it to 'reverse engineer'problems as that seems to help me understand the process better.

Its better than photomath and also easier to use. It calculates everything exactly how it should be and gives every possible answer to the equation. It doesn't work on word problems sadly, but it is still a really useful app. It's overall a pretty good app all except for the fact that it extorts you just so you can get how they got the solution but good thing edia doesn't require that.

You point a camera at a non-trivial math problem - handwritten, smudged with coffee - and it gives you back a step by step solution, i found some confusion at first with the camera but thats null now that I got a grasp on how to use it, 10/10.