QUES: But he forsook the advice of the old men which they had given him and consulted with the young men who had grown up with him that stood before him

correct the punctuation.

CORRECTED: But he forsook the advice of the old men which they had given him, and consulted with the young men, who had grown up with him, that stood before him.

QUES: Finally the article can be used to introduce modelling a fundamental concept in science and how it is based on data or conversely how data are fitted into the model

correct the punctuation.

CORRECTED: Finally, the article can be used to introduce modelling, a fundamental concept in science, and how it is based on data, or conversely how data are fitted into the model.

QUES: This rake is fitted with a special sixwheel undercarriage that is partly raised during transport

correct the punctuation.

CORRECTED:
This rake is fitted with a special six-wheel undercarriage, that is partly raised during transport.