For your comment on coordinates, if the coordinates are in a field such as personal note or elsewhere, they will be underlined. If you tap the underlined coordinates you can create a waypoint, set as corrected coords, copy them, navigate to those coordinates, etc.
Not sure what you mean by a formula calculator. There are a few apps, some free, that focus solely on "tools" for solving, etc. Check out apps like GC Wizard and others. There are also online sites specific to puzzle solving, etc.