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a fost răspuns

[(80 x-2011):5+84:4] 7 = 175
X424-2 [872-1 000: (5+1x)]:4=8
[200-25 (2 + 18:x)]: 4+ 10-49:7=28
700+580:4 - [368 x + 3 (15+10+6)] = 660