Complex sentence: In performances given in America and/or featuring American or British orchestras, the concertmaster will usually walk onstage individually after the rest of the orchestra is seated, and bow and receive applause on behalf of the orchestra before the conductor appears.
Split into simpler sentences: In performances given in America and/or featuring American or British orchestras, the concertmaster will usually walk onstage individually after the rest of the orchestra is seated. They will bow and receive applause on behalf of the orchestra before the conductor appears.