Another lot of clues then. Recall the previous ones:
282 is from an orchestral piece with two soloists, neither of whom are heard in this excerpt.
283 is from the early stages of a symphony to which a chorus is added later on.
286 is by a composer whose surname not only suggests a nationality other than the one he has, but actually something quite other than music altogether.
to which I now add:
282 was completed in 1974 and its composer was German.
283 was completed in 1923 and its composer was Russian.
286 was completed in 1975 and its composer is French.