Found in a math textbook

1. 

   Felix

   January 30, 2015 at 8:05 am

   Sorry but… where is the fail?
   1. 

      dr what

      January 30, 2015 at 6:50 pm

      P_0r^n
2. 

   Andy

   January 30, 2015 at 11:39 am

   I didn’t post this, and had the same reaction. But I’m guessing it’s just the “porn” at the bottom.

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