Triple 3 and then add double 8
6+6+6+8+8=31 that's the answer to your problem
I'd have to disagree with RedstoneKing. Triple 3 means 3 x 3.Double 8 means 8 x 2Add means + Therefore,(3 x 3) + (8 x 2) =9 + 16 =25 25 is the answer, i believe!