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Anonymous
The sum of 3 and -6 is -3.
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-3 + -7 + 5 + -4 + -6 = -15
negative 9
3 + -9 = 3 - 9 = -6 (negative 6)
8+6+(-3) =14+(-3) =11
3 raised to negative 2 would be -9 plus 6 to the negative 1 which is -6 so -9+-6=-15