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There is a pattern. The first column is initially the entered number (5), subtracted by 1. Hence you have 4 in the first column. The difference between the first number and the initial number is 1, since 5 - 4 = 1. The first number is again decreased by 1, resulting in 3. 5 - 3 = 2. 2 by itself can be expressed by 1 + 1, that'S why the 3rd row has 3 + 1 + 1. I think you can take it from there.

You

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