Answer:
9(3+5)
I'm not sure if this'll be right, but here goes. When there is a number before ( ) without a symbol in between, it means that you have to multiply the number (which in this case is 9) with each of the numbers in ( ) (in this case 3 and 5)
1) 9×3=27
2) 9×5=45
And that way you get the answer 27+45
Sorry if this was a bit confusing, I'm not actually English, so I didn't exactly know how to explain it :)