how do i answer with order of operations

3^2 - 4 (10 + 8) + 16/2

I searched Google under the key words "algebra order operations" to get these possible sources:

http://www.math.com/school/subject2/lessons/S2U1L2GL.html
http://www.algebrahelp.com/lessons/simplifying/oops/
http://www.themathlab.com/Pre-Algebra/order%20of%20operations/orderof.htm
http://campus.northpark.edu/math/precalculus/rules.html

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

I hope this helps. Thanks for asking.