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# Complements

You are in the complement of the set of people who are not Brilliant.

Tina has chosen some books at the book store, and she would like to buy: \(6\) novels, \(6\) math books, and \(3\) biographies. However, Tina can only afford to buy \(4\) books.

Since she can't buy them all, if she needs at least \(1\) math book and puts back all the biographies, how many difference choices of books could she make?

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