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Let the function 4 (x) be such that: 4 (4) = 2 for x = 4. 4 (8) = 6 for x = 8. 4 (12) =10 for x = 12. We have 3 solutions: 4 (4) +4+ 4 = 10 4 (4+ 4) + 4 = 10 4 (4 +4 +4) = 10 There are exactly four 4 and exactly two signs and exactly two additions, and it is computer programmable.


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