d) -120 - (-45-{15-10(-18 - 15)}]
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Explanation:
= -120 - [-45-{15-10(-18 - 15)}]
= -120 - [-45-{15-10(-33)}]
= -120 - [-45-{15 + 330}]
= -120 - [-45-{345}]
= -120 - [-45 - 345]
= -120 - [-390]
= -120 + 390
= 270
hope it helps you ☺
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