QUESTION: Fix punctuation: When the devil or Satan is mentioned in the Bible or other holy books this even if it is not to be understood literally is something which has been pulled out of thin air
ANS: When the "devil" or "Satan" is mentioned in the Bible or other holy books, this, even if it is not to be understood literally, is something which has been pulled out of thin air.

QUESTION: Fix punctuation: Products for CONTROLLER dj gear  lighting Power supply
ANS: Products for CONTROLLER dj gear & lighting Power supply

QUESTION: Fix punctuation: It is not hard to see as you walk around the city of Barcelona that one of the most popular ways of getting around is via motorbike
ANS: It is not hard to see as you walk around the city of Barcelona that one of the most popular ways of getting around is via motorbike.

QUESTION: Fix punctuation: To buy the software please openGoogle Playon your Android phone Payment can be made simply and conveniently via Google Checkout
ANS:
To buy the software, please openGoogle Playon your Android phone. Payment can be made simply and conveniently via Google Checkout.