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2(8•8+7•2)-3(6•9-7•3)=

Răspuns :

2(8*8+7*2)-3(6*9-7*3)
2(64+14)-3(54-21)
2*78-3*33
156-99
57
2(64+14)-3(54-21)=57
2*78-3*33
156-99=57