2× 4 - 8, 5 × 2 - 10, 2× 8 - 16, 2× 7 - 14, 6×2 - 12, 2×1 - 2, 2 × 10 - 20, 2× 3 - 6, 9 × 2 - 18, 2×2 - 4,

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