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2014-03-06T14:11:57+02:00
2014-03-06T14:14:35+02:00
900:9+(820-440:2)=
900:9+ 820-   220=
900:9+      600=
   100+    600=
           700.
900:9+(820-440:2)=
900:9+(820-440:2)=100+(820-220)=100+600=700