Вычеслите 1-23/21= и 2-69/31= ПОМОГИТЕ ПОЖАЛУЙСТА!!!!!!!!!!!!!!!!
1-23/21=21/21-23/21=-2/21
2-69/31=62/31-69/31=-7/31
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1-23/21=21/21-23/21=-2/21
2-69/31=62/31-69/31=-7/31