QUES: But if that sort of tasks is what you are trying to make a living doing hobbyists and amateurs obviously become a very tough kind of competition

correct the punctuation.

CORRECTED: But if that sort of tasks is what you are trying to make a living doing, hobbyists and amateurs obviously become a very tough kind of competition.

QUES: Receiving foreign customers distributors and agents in Denmark on behalf of and in cooperation with Danish companies Planning a program for the visit

correct the punctuation.

CORRECTED: Receiving foreign customers, distributors and agents in Denmark, on behalf of - and in co-operation with - Danish companies. Planning a program for the visit.

QUES: wheel elastictyre with wheel centre from polyamide 2RS precision ball bearings threadguards with labyrinth seal

correct the punctuation.

CORRECTED:
wheel: elastic-tyre, with wheel centre from polyamide, 2-RS precision ball bearings, threadguards with labyrinth seal