Complex sentence: In 1982, he became the principal conductor of the Gothenburg Symphony, and during his 22 year tenure-the orchestra's longest-the recording profile and reputation of the orchestra greatly increased.
Split into simpler sentences: In 1982, he became the principal conductor of the Gothenburg Symphony, and held the post for 22 years, the longest-serving principal conductor in the orchestra's history. During his Gothenburg tenure, the recording profile and reputation of the orchestra greatly increased.