To put this into easier form:

(nota digit) (1ormore digit) (literal dot) (1ormore digit)

As far as I can see in that text, none of them end with "5.4” or "3.6” or "0.0”, so no your regex wont work

Maybe change the middle " \d+" into "\d*" , or surround the "\d+\." with a question mark group?

What am I doing wrong?

Not specifying the regex engine you use, first of all. Second, also describe what you mean by numbers that you want to match.

(?<!\d) -> Not sure why you're doing this.

\d+\. -> Look for at one or more digits followed by a period. None of the sentences have numbers before the period, and if the previous section didn't exclude them, this would.

\.\d+ -> look for a period followed immediately by one or more numbers. This should get most of the trailing 0's, but you'll miss the ones on their own newline and following a quotations mark.

\.0\ -> If you only have a single character you'd like to remove, there's no harm in enumerating it.