Complex sentence: He performed as a soloist as well as together with Sviatoslav Richter, David Oistrakh, and as a member of a trio with Mstislav Rostropovich and Leonid Kogan.
Split into simpler sentences: He performed as a soloist as well as with Sviatoslav Richter, David Oistrakh. Barshai was also a member of a trio with Mstislav Rostropovich and Leonid Kogan.