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2014-11-09T07:54:52+02:00
9•13•10:5+6•e=4•2+200. | 927•10:5+6•e=8+200. | 9270:5+6e=208. | 1854+6e=208. | 6e=208-1854. | 6e= -1646. | e= -1646 supra 6 | e= -274,(3)