Got it, I had to get my code to make a guess on the medium difficulty puzzle as the strategies I used didn't give me all the way. There's actually an issue with my code in that if it doesn't guess correctly the program will break. Should probably fix that and do a massive refactor as 700+ lines of code is wayyyy too much. On the plus side time was never an issue for me so didn't have to optimze at all.

You shouldn't get any.

That is the hardest thing I've done. Can't believe that I finished it.

You should add "(1 - 2) + -(-(-4))" to the final tests as it's possible to pass this Kata without dealing with brackets that need to be flipped odd times.