Evidence of Chemical Weapons Used by the Secret Police

__ + __ + __ + __ + __ - 63 (???)
__ + __ + __ + __ - 78 (Cover All Your Bases)
__ + __ - 61 (???)
__ + __ + __ - 107 (xkcd)
__ + __ + 19 (Cross Words)
__ + __ + __ + __ + __ + 3 (???)
__ + __ + __ + __ + __ + __ + __ - 136 (The 2010 Mathcamp Easter Egg Hunt)
__ + __ + __ - 4 (Crossword)
__ + __ + __ - 190 (iMath)