QUESTION: Fix punctuation: Door call 3tone call signal without G connection or chime with G connection storey call 2tone call signal
ANS: Door call: 3-tone call signal (without G connection) or chime (with G connection), storey call: 2-tone call signal
QUES: The banks wanted such insurance to remove the risk associated with the mortgages and mortgagebacked securities which they had purchased

correct the punctuation.

CORRECTED: The banks wanted such insurance to remove the risk associated with the mortgages and mortgage-backed securities which they had purchased.
Question: Before you can open a QN2 file youll need to figure out what kind of file the QN2 file extension refers to
--
Answer: Before you can open a QN2 file, you'll need to figure out what kind of file the QN2 file extension refers to.
Some small part of the discharge energy is thus transferred also in relatively distant plants or their root system

Can you repeat this sentence, but add in punctuation?
Some small part of the discharge energy is thus transferred also in relatively distant plants or their root system.
input: The 1870s saw Hermite return to problems which had interested him earlier in his career such as problems concerning approximation and interpolation
fixed: The 1870s saw Hermite return to problems which had interested him earlier in his career such as problems concerning approximation and interpolation.
Add sugar glycose syrup cinnamon lemon and apple juice to a thick bottomed pot keep a sugardigital thermometer by the side

Can you repeat this sentence, but add in punctuation?
Add sugar, glycose syrup, cinnamon lemon and apple juice to a thick bottomed pot, keep a sugar/digital thermometer by the side.