Try looking into the difference between '==' and '===' operators
https://developer.mozilla.org/en-us/docs/Web/JavaScript/Reference/Operators/Strict_equality

Can't use string literals

There is only the difference in handling the 'negative' string component that makes these kata different. I was able to take my add function from doing this beta, and copy-paste it exactly into the other kata, and it worked.

Additionless Addition

function wholeInt() { '' }

Error: You cannot use general math operators, or regex

???

If you're going to forbid certain things, it helps solvers immensely if the tests give accurate failure messages.

When I have a literal string in my solution, I get "Error: You cannot use general math operators, or regex", which points in a totally wrong direction if I also have "&" in it. Because "&" might fall under "math operators such as [+-*/%]".

Be precise, both in specifications and in error messages. "such as" and "some parts" have no place in specifications.

This has been done. It was called "additionless addition" or something.

I have fixed them, thank you for the input.

Thank you for the feed back, I hope I've managed to resovle everything, but if you happen to do this again and see any issue please leave another comment.

Sample tests are broken.

You should unpublish immediately and add random tests.