I need Camera Math Solver app source code for iphone

I need Math problem solver app ios source code with camera. I see that different developers have published the same code in the App Store. They download this same code from codecanyon or github style sites. I don't have time to search in detail on the internet right now. So I need the source code of the app in the screenshots I posted. I want to publish the app. The application will not be written from scratch, because it is in ready-made code.