QUESTION: Fix punctuation: he begins doing poorly
ANS: ...he begins doing poorly.

QUESTION: Fix punctuation: Ankles and knees are the next most commonly involved joints in gout
ANS: Ankles and knees are the next most commonly involved joints in gout.

QUESTION: Fix punctuation: I have never tried not having a job not belonging to a place and now I was completely free and all alone
ANS: I have never tried not having a job, not belonging to a place, and now I was completely free (and all alone).

QUESTION: Fix punctuation: Transfer from Port of Dover to London Liverpool Street TRZLS Train station
ANS:
Transfer from Port of Dover to London Liverpool Street (TRZLS) Train station