QUES: I havent found the answer to my question

correct the punctuation.

CORRECTED: I haven't found the answer to my question.

QUES: This was not only dangerous for Daimler But that made him at times almost despair of ever developing an engine that struck in the right moment for himself

correct the punctuation.

CORRECTED: This was not only dangerous for Daimler. But that made him at times almost despair of ever developing an engine that struck in the right moment for himself.

QUES: Original Thule Audio IA100logo sign with gold text for design update or spare parts

correct the punctuation.

CORRECTED:
Original Thule Audio IA100logo sign with gold text for design update or spare parts.