QUESTION: Fix punctuation: The Cathedral of Porto on the outcrop above the Ribeira square is also within walking distance as is the Torre dos Clerigos the imposing Avenida dos Aliados and the So Bento train station from where one can continue ones travels to the rest of Portugal or indeed the rest of Europe
ANS: The Cathedral of Porto, on the outcrop above the Ribeira square, is also within walking distance, as is the Torre dos Clerigos, the imposing Avenida dos Aliados, and the São Bento train station, from where one can continue one’s travels to the rest of Portugal, or indeed the rest of Europe.

QUESTION: Fix punctuation: Flatrolled products of iron or nonalloy steel of a width of  600 mm hotrolled or coldrolled coldreduced corrugated plated or coated with zinc excl products electrolytically plated or coated with zinc or not further worked than surfacetreated or simply cut into shapes other than rectangular including square
ANS: Flat-rolled products of iron or non-alloy steel, of a width of >= 600 mm, hot-rolled or cold-rolled "cold-reduced", corrugated, plated or coated with zinc (excl. products electrolytically plated or coated with zinc, or not further worked than surface-treated, or simply cut into shapes other than rectangular "including square")

QUESTION: Fix punctuation: It is important to follow the users manual regarding start up of fuel cells It is not dangerous but methanol must be treated with the same caution as petrol and diesel
ANS: It is important to follow the user’s manual regarding start up of fuel cells. It is not dangerous, but methanol must be treated with the same caution as petrol and diesel.

QUESTION: Fix punctuation: 44th  Free English online dictionary based on WordNet 30
ANS:
44th - Free English online dictionary based on WordNet 3.0