Wow, order of operations much? I can't tell if you're serious about what you said, or just trolling. Hopefully no one past elementary school wouldn't make that mistake... Anyone who answered zero is simply wrong. There is no debate as there are no parentheses here. You can actually sum up the problems of each respondant this way: 0: Doesn't know how order of operations in basic arithmetic works. 14: Is correct. 16: Missed the subtle "-" instead of "+". 17: Can't count 1's.
It's almost shocking that so many people got it wrong. I didn't think it would be necessary to explain this, but of course TSchmal is correct.
I have to believe that people are choosing "0" as a joke, I can't believe that 40+ percent of people on this board don't know the order of operations.