Вопрос от 1 курса техникума.Дано:  A={0,1,2,3,4,5,6}
B={1,2,3,6,8}
C={-1,0,3,4,7,8}

Найти:
A∪B; 
A∩B∩C; 
(A∪B)∩C; 
A∪(B∩C)

P.S. Это одно задание, а не несколько.
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