Seven rays and the wheel are definitely staples. seven rays seems to be on just about any 70s era utopia show(post another live). the wheel is also played at most of those and was also featured on the swing to the right tour you can see it on the dvd live at Royal Oak.
Bucks boogie from blue oyster cult does have a studio recording though it wasn't issued until much later.
Similarly ELPs pictures at an exhibition and the studio version is so much lesser in scope I think it still qualifies here. also nutrocker and peter gunn.
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