What is it? It is only a mathematical formula; as, you did not ask for the answer, only an identification.
[ can you answer this ] = yes, I just did.
And plus Ten = an expansion on the equation.
Now if you put an [ = ] between the, ) and the ?, that would have been different.
The breakdown of the formula is 3 X 3. The answer, as ask, is equal the numerical value of 9; and plus ten.
I think that about sums it up.