I think there are bugs with error describing:

1. There is often "unknown error"
2. I've got this string "3 should equal 0" on first test, correctly "0 should equal 3".

one of the fastest versions, I think

I don't know why, but interpreter raise IndentationError: unindent does not match any outer indentation level

But I'm sure in my code

You know, it was very unfair to declare m, n as float. Realy, at least it is mathematically illogical.

I wanted to solve it using locals()
But seems it doesn't work