User blog comment:Milesprower2/MP2's Present Blog/@comment-26531060-20130507022319

7 * 5 = 35

2013 => 2 + 0 + 1 + 3 = 6

35 - 6 = 29

2 + 9 = 11

2013 * 11 = 22143

22143 / 35 = 632.6571428571429 ~ 633

633 - (29 * 11) = 633 - 319 = 314

314 - [(7 * 5) * 11] = 314 - [35 * 11] = 314 - 385 = -71


 * -71| = 71

71 - 35 - 29 = 36 - 29 = 7

I'll pick 7.