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The sum of 7 plus 71 is 77.
SUM means plus 4+7=11
The sum of 3 plus 4 is 7.
71 + 847 = 918 165 + 72 = 237 192 + 192 = 384
The sum is: 8
71
3 + 7 is an ADDITION sum
(7*8)+(7+8) = 56+15 = 71
14 = 7 + 7
The sum is 1511.
negative 4
-4
7(7 + 9)