Code:
$ A\cup B=\mathbb{Q}, A\cap B=\emptyset, A\ne\emptyset, B\ne\emptyset,\forall a\in A, b\in B : a
Code:
$ A\cup B=\mathbb{Q}, A\cap B=\emptyset, A\ne\emptyset, B\ne\emptyset,\forall a\in A, b\in B : a
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