Regular expression - how to remove extra characters?

Question

Regular Expressions

Hello! It is not possible to compose a regular expression, there are approximately the following lines:

5.  
⊕57,371.  
623224↓57,3.  
60↑57,37209.  

You need to convert them to numbers without all the extra stuff:

5
57371
573
5737209

Those. leave only the number that comes before the point, and remove the commas. The numbers themselves are subject to change.

Answer 1

/(\d+)?[.,]?(\d+)\./

Answer 2

/([0-9]+,[0-9]+)\./
Check here

Answer 3

Select all non-digits and replace them with ''.
regex101.com/r/aN7qT7
PS. I missed the last condition.
Then @TomaZ's option is fine.
My version:
((\d+)[,])?(\d+)[.]