The sum of related elements in the mathematical set is used to calculate the competition questions.

If you sum, you can get rid of the empty set first.

Then analyze:

There are 2 9 subsets containing the element 1, so 1 appears 2 9 times in total. Similarly, elements 2, 3, 4 ... and 10 appear 2 9 times in total, so the sum is:

( 1+2+3+……+ 10)*(2^9)=28 160

Mathematics can't be grasped.

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