1/1+(1:(2+1/3))=1+1: 2 1/3=1+1:7/3=1+1* 3/7=1+3/7=1 3/7
1/1+(1:(2+1/3)) = 1+(1:7/3) = 1+3/7 = 1 целая 3/7
1/1+(1:(2+1/3))=1+1: 2 1/3=1+1:7/3=1+1* 3/7=1+3/7=1 3/7
1/1+(1:(2+1/3)) = 1+(1:7/3) = 1+3/7 = 1 целая 3/7