Complex sentence: During the last years of his position, Norway established its first railroad, its first telegraphic lines, a system of common postage and stamps, and several laws were established, helping the development of different kinds of industries in Norway.
Split into simpler sentences: During the last years of his position, Norway established its first railroad, its first telegraphic lines, and a system of common postage and stamps. Several laws were established, helping the development of different types of industries in Norway.