Ответы на вопрос:
[(-3-2) + (-1/12-1/15)]: [-103/20] = = [-5+(-5/60-4/60)]*[-20/103] = = [-5+(-9/60)]*[-20/103] = = [-5+(-3/20)]*[-20/103] = [-103/20]*[-20/103] = 1
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