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Anonymous
The sum of 7 plus 7 is fourteen (14). This level of math is usually learned by elementary school students who memorize basic arithmetic such as addition and multiplication.
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SUM means plus 4+7=11
The sum of 3 plus 4 is 7.
14 = 7 + 7
7(7 + 9)
It is: 8+1+7 = 16