Hello. I know that since you are on this site and are looking at advanced equations you are probably just trying to get somebody to waste their free time on this silly question. I suggest that if you really need help on a math problem you should post it on this site. If not, why don't you help somebody else with their problem? But if you really do need help with this question, the answer is 9. But I bet you already know that.
But honestly, it's not very funny.
Lilypop
