simplify 111-(1/2(7+(40-7+6))+100
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111-[1/2{7+(40-7+6)}+100]
111-[1/2{7+(40-13)}+100]
111-[1/2{7+53}+100]
111-[1/2 +60+100]
111-[1/2+160]
111-[332/2]
111-83
28 (answer)
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