Here's a free google-sheet formula parse and evaluate tool for untangling formulae:
https://docs.google.com/spreadsheets/d/1wwclmAMXGaFanVLlyvzv63fDx6JkwOcT6Dkisac-sXI/copy
It's free. It's tiny. It's just a simple shared google-sheet file (with no macros, add-ons or fancy stuff). Click the link to make your own copy. Have a try, and if you like it, bookmark it for future use while fighting formulae in google-sheet.
I made it to make up for the lack in google sheet of the Evaluate Formula (F9) parser native to Excel. It analyses any formula pasted into yellow cell G1, splitting and colouring them by depth or by chosen characters, and referencing them against the available formulae to see where brackets or commas are likely to have been omitted or put in the wrong place. A handy tool for simple checks, and for making or parsing complex or nested formulas, and for finding 'Parse Error', and diagnosing #REF!, #NAME?, #N/A, #NUM!, #VALUE! error codes.
Enjoy!