Ответы на вопрос:
1) 5*2/14 - 11/14= 10/14-11/14= -1/14 2) -93//3-19/5)= -93/4+19/3+19/5= -93*15/60 + 19*20/60+ 19*12/60= -1395/60 + 380/60+228/60= -787/60= -13 7/60 3) 7/9+(1/14- 2*2/14)=7/9+ (1/14-4/14)= 7/9-3/14= 7*14/126 - 3*9/126=98/126-27/126= 71/126
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