887/42*6/43-49/43*4*5/3=887/7*1/43-980/129=887/301-980/129= - 4199/903
вот как-то так
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887/42*6/43-49/43*4*5/3=887/7*1/43-980/129=887/301-980/129= - 4199/903
вот как-то так