3 + 7 - 16 - 6, 9 - 5 - 2 + 2, 19 - 5 - 10 + 4, 3 + 2 - 14 - 9, 1 + 0 - 21 - 20, 12 - 10  - 6 - 4, 4 + 4 - 10 - 2, 17 - 10 - 3 + 4,

Which ones have the same answer? (add/sub)

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