Question: Working with sets

How would I make a subset in a set.

 

For example,

What if I had the sample space {1,2,3,4,5,6,7,8,9,10}.

A = {1,2,3,4}

B={4,5,6,7}

C={8,9,10}

How would I be able to ask C complementary and it would give me the elements that don't belong to C.

 

Thank you!

William

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