QUESTION: Fix punctuation: Failure to do so can result in tumors growing out of the chest cavity along the injection line
ANS: Failure to do so can result in tumors growing out of the chest cavity along the injection line.
QUES: This light is supposed to be the start of a series the supplied manual covers both IFE1 and IFD2 2xAA

correct the punctuation.

CORRECTED: This light is supposed to be the start of a series, the supplied manual covers both IFE1 and IFD2 (2xAA).
Question: Eugene Talmadge courted Ms Mitt and proposed to her and she accepted
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Answer: Eugene Talmadge courted Ms Mitt and proposed to her and she accepted.
Debt to non working partners liabilities end of year DKK 1000

Can you repeat this sentence, but add in punctuation?
Debt to non working partners (liabilities), end of year, DKK 1000
input: Amazing beach front apartment in Barcelona BH2546
fixed: Amazing beach front apartment in Barcelona BH-2546
You can only change your own user modes therefore the nickname will always stand for the nick that you are using at the time

Can you repeat this sentence, but add in punctuation?
You can only change your own user modes: therefore, the nickname will always stand for the nick that you are using at the time.