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2014-03-04T19:49:56+02:00
A-b=(246+354):2
a-b=600:2
a-b=300
b=11
a-11=300
a=300+11
a=311
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2014-03-04T22:01:40+02:00
D-S=(246+354):2
D-S=600:2
D-S=300
S=11
D-11=300
D=300+11
D=311
V:311-11
   =300
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