Recently found just such a most interesting puzzle and decided to share with the community. Actually the task itself:
In the written expression ((((1? 2)? 3)? 4)? 5)? 6 instead of each "?" insert the sign of one of the four arithmetic operations: +, -, *, / so that the result of the calculations is 35 (when divided, the fractional part in the private is discarded). It’s enough to find one solution.