QUES: For example governors and city mayors previously had been elected by their electorate but the new constitution gave the President the power to appoint such officials

correct the punctuation.

CORRECTED: For example, governors and city mayors previously had been elected by their electorate but the new constitution gave the President the power to appoint such officials.

QUES: Newsdetail Bosch in Denmark Bosch Denmark Reach destinations safely and stressfree with Bosch

correct the punctuation.

CORRECTED: Newsdetail Bosch in Denmark - Bosch Denmark Reach destinations safely and stress-free with Bosch

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.