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2014-10-28T12:30:52+02:00
A+b=168 853
a=79 327
b=?
79 327+b=168 853
b=168 853-79 327
b=89 526
2014-10-28T12:36:25+02:00

79 327+x=168 853
x=168 853-79 327
x=89 526