МАТЕМАТИКИ,ВЫРУЧАЙТЕ 4 5 И 6!!!!!!!!!!!!!!

Question

МАТЕМАТИКИ,ВЫРУЧАЙТЕ 4 5 И 6!!!!!!!!!!!!!!

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Answer 1

4. 1//7+1//4-1=4//28+7//28-28//28=11//28-28//28=-(17//28)
5.2
6.3