QUESTION: Fix punctuation: By doing this he found that his medicines instead of having as one would expect lowered therapeutic effect exhibited fewer side effects while retaining their potency
ANS: By doing this he found that his medicines, instead of having, as one would expect, lowered therapeutic effect exhibited fewer side effects while retaining their potency.

QUESTION: Fix punctuation: In the case that your CAZ file doesnt open it is highly likely that you do not have the correct software application installed on your PC to view or edit CAZ file extensions
ANS: In the case that your CAZ file doesn't open, it is highly likely that you do not have the correct software application installed on your PC to view or edit CAZ file extensions.

QUESTION: Fix punctuation: Birth November 6 1903 in Ansager Denmark
ANS: Birth: November 6, 1903 in Ansager, Denmark

QUESTION: Fix punctuation: Step 3 Select the option whether to recover deleted files or to recover lost files
ANS:
Step 3: Select the option, whether to recover deleted files or to recover lost files.