5÷5/7; 5/1×5/7; 35/5; 10 5/5 это верно
5÷⁵/₇ = 5×⁷/₅ = ⁵ˣ⁷/₅ = 7 ⁵/₁×⁵/₇ = ⁵ˣ⁵/₇ = ²⁵/₇ = 3⁴/₇ ³⁵/₅ = 7 10 ⁵/⁵ = 11