99% Can't Solve This | Can You Simplify This Radical Expression? | Math Olympiad

[@ManojkantSamal]

*=read as square root
Ans: 9/{2.*154}.....May be

[@遠傳五華]

Weird...
Equ=Sqrt(1/87-1/88+1/86-1/87+1/85-1/86...+1/8-1/9+1/7-1/8)
=Sqrt(-1/88+1/7)
=Sqrt[(88-7)/(7*88)]
=Sqrt(81/616)