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15+[34×(589-568)-(671+349)]



Răspuns :

15 + [ 34 × ( 589 - 568 ) - ( 671 + 349 ) ] =

15 + ( 34 × 21 - 1020 ) =

15 + ( 714 - 1020 ) =

15 + ( - 306 ) = - 291