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Anonymous
-7 + 5 + 3 + 216 = 217.
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true. 5+3=8 8+7=15 5+7=12 12+3=15
3+6+5+7+(9-7)=23
5 + 2 + 3 + 7 + (21/7) = 20
it is the same i believe
false. because 5plus 3 plus 7 equals, 15, and 15 plus three is not seven