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2013-10-02T09:49:34+02:00
(4 - 4) x  4 + 4= 4
4 x 4 + 4 x 4 = 32
(4  +4 + 4) x 4=48
4 x 4 x 4 - 4  =60
(4 + 4) x (4 + 4)  =64
(4 x 4 + 4) x 4=80