Найди сумму чисел:1 2/5+2 3/7+1+4 5/7+3 4/7 +5/7+1/7 =
7/5+17/7+1+33/7+25/7+5/7+1/7= 7/5+1+81/7=49/35+1+405/35= 1+ 454/35= 1+ 12 34/35= 13 34/35