Question: Let L 1 = { ab , ba } , L 2 = { b , aa , abba } , L 3 = {

Let L1={ab, ba}, L2={b, aa, abba},
L3={x|x in a, b|x|3}={, a, b, aa, ab, ba, bb, aaa, aab, aba, abb, baa, bab, bba, bbb}.
What does (L
1L2)L3 equal to? Give your answer as a set.

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