ForMula oo
  -------------------------

 0 + 0 = 0              (2/+69-*=0)

 1 + 1 = 1              (125/365*8-2=1)

 2 + 2 = 2              (25-12+452/125=2)

 3 + 3 = 3              (125/2542*659=3)

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 O - O = O-O    (institutio media, www.o-o.lt)