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2014-09-26T16:07:25+03:00
2004x2005-2003x2004-2x2002=2004 x ( 2005 -2003 ) - 2 x 2002=
= 2004 x 2002 - 2 x 2002= 2002 x (2004 - 2)=2002 x 2002=4.008.004
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