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If a 1 2 3 4 5 then the number
If a 1 2 3 4 5 then the number pictures 5
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If a 1 2
If a 1 2 3 4 5 then the number
if a 0 1 2 3 4 5 then the number of subsets of a is
if a 1 2 3 4 5 then the number of proper set of a is
if a 1 2 3 4 5 then the number of proper subsets of a is
