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Each expression is equivalent to one other expression in the following list.

Identify the pairs of equivalent expressions.

1. \(\sqrt{2}\left(\sqrt{2}+\sqrt{32}\right)\)
2. \((5+\sqrt{3})(4-\sqrt{2})\)
3. \(\sqrt{48}+20-\sqrt{6}-\sqrt{50}\)
4. \(1-\sqrt{18}+\sqrt{2}-\sqrt{16}\)
5. \(\sqrt{27}+\sqrt{100}-\sqrt{3}-\sqrt{12}\)
6. \(\dfrac{1+\sqrt{2}}{1-\sqrt{2}}\)