abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
A= {2,3,5,7,8} U B= {2,4,6,8,9 }
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{2,3,4,5,6,7,8,9}
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A= {2,3,5,7,8} ∩ B= {2,4,6,8,9}
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{2,8}
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B= {2,5,6,12,13} U C= { 2,6,8,10,11}
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{2,5,6,8,10,11,12,13}
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B= {2,5,6,12,13} ∩ C= { 2,6,8,10,11}
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{2,6}
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D= { 15,18,23,28} U E= {18,23,24,27}
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{15,18,23,24,27,29}
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5 _ N
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ϵ
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-9 _ N
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∉
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21 _ N
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ϵ
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60 _ I
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∉
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