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1.
Plus or Minus Man is a Calculus superhero. He has the power to make square roots either positive or negative (plus or minus).

His other powers include the Integration Inferno, Derivation Disaster, and the dreaded, cataclysmic L'Hopital Derivation.
Person 1: "Amg, this Calculus test is so hard...negative one-half are you freaking kidding me??!!!"

Person 2: "Never fear, Plus or Minus Man will be here!! He will integrate and derive everything for us!!"
by PChao November 25, 2010