Fixed in both languages it seems

Approved by someone, but issues should be dealt with

@SnAufe

most Katas are over 90%

Are you sure about that?

Because of your first if.

It's already raised as issue

It sometimes depends on the approach. This kata is tricky without regex.

Both of which do not affect time complexity - it's still O(n log n).

Sorting twice unnecessarily means you can easily increase speed twofold, but we're essentially talking micro-optimisations here. Apparently, they're necessary though.

same,give it time

My dudes, I'm 5 kyu and I'm doing mostly 7 kyu katas, RARELY some easy 6 kyu. 5 kyu kata? Out of my league :D

No, satisfaction rating is 82%, that is low considering most Katas are over 90%.
I hated this Kata, doesn't teach you anything, waste of time. Hence this angry comment.

Ok now I don't feel so worthless if a 4ky took two weeks to do this. I am a lowly 5 kyu and I was frustrated I couldn't get it in one hour and thought that implied I was too dumb for this:) thank you sir or ma'am for encouragement.

Yes, perhaps more useful too like generating math expressions via interacting codecogs like API, or just generating mathJax commands via some simple programming/formatting language which atleasts supports variable, doing this would be the life a lot easier.

Even if it is sufficiently good, it would be usable.

I think @neilm pretty much summed up the fundamental "issue" with the kata: lack of novelty. This actually seems to be the biggest issue for all your (@Rbaha07) katas, as evidenced by the vast majority of them being retired early.

The obvious solution to this is to come up with a unique idea. But the task of coming up with a unique idea has no obvious approach and, therefore, may be difficult to achieve.