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Verified answer
1).3 + (-6) - (-10) = -3 + 10 = 72).(-15) - 8 + (-7) = -23 + (-7) = - 30
3).12- (15 - (-18)) = 12 - 33 = -21
4).23 - (-17-28) = 23 - (-45) = 68
5.-30 - (45 -(-27)) = -30 - 72 = - 102
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