I have no sigma on my keyboard so I will use & instead. What sigma notation does is replaces values from its lower limit to its upper limit into an expression that DOES NOT change. So, the numbers that are changing in your expression start at 1 and increase to 14. These are the upper and lower limits for the sigma. This is also where you're going to replace those numbers with a variable, usually i, but since you already have an i in your expression, I'll use j. So your answer is

14

& 9/(i+j) ....

j=1

Checking, replace j with 1, then 2, then3...up to 14 and you'll get 9/(i+1) then 9/(i+2) up to 9/(i+14) which needs to get added which is your original expression.