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2014-03-14T14:48:23+02:00
3263-1245-u=603
3263-1245-603=u
2018-603=u
1415=u
2 5 2
2014-03-14T15:02:55+02:00
3263 - 1245 - u = 603
u = 3262-1245- 603
u = 2018- 603
u = 1415
(3263-1245)-1415 = 603