Correct, but my goal was just to get the same result than JS `eval()`except for -n * m because in my opinion this shouln't require parenthesis. It's still a goo

Correct, but my goal was just to get the same result than JS `eval()`except for -n * m because in my opinion this shouln't require parenthesis. It's still a good learn to do this, I don't want to deal with floating points things etc..