You can watch ad here as well if you'd like to see the solution for free. Thanks for all who developed this app. It helped me with homeworks and assignments. This app has helped and even saved my butt multiple times, it not only calculated things easily and efficiently it also told me what was going on and how to work it out myself.
Best ever nothing else iv tried has worded but this is the one, best calculation app for me, very helpful when checking my work for mistakes, it gives you a lot of choices of how you want them to explain the answer like evaluate it, divide, and etc.