This is actually quite simple. It's simply :

+

. And since you don't know the value of w, all you would have to do to simplify the equation is add 8 and 3, and if you did that, you would get 11. That would make it :

.
But if you did know the value of w, you would have to use PEMDAS. (Punctuation, Exponents, Multiplication, Division, Addition, and Subtraction.) So you would have to divide the respective numbers by their w-values, before adding them together.
Whatever the case, that expression simplified is
.