I have formula with variables and constants such as numbers. From that formula I want to grep only variables, not functions https://regex101.com/r/bPLoAP/2
Something similar I found here
Regex for string not ending with given suffix
My regex expression is: ([A-zА-я]+[0-9]*(?!\())
With this regex expression I expect to see variables not ones that have beginning parenthesis "("
But what I see is that regex is throwing last symbol from word which has starting parenthesis after it
