2011/9/22 selim eren <terakki41@gmail.com>
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http://www.facebook.com/pages/Matematik-Geometri/150709609688?ref=mf
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Kemal Hasoğlu Lisesi
Bahçelievler İstanbul
HAYDAR DOOOST
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http://www.facebook.com/pages/Matematik-Geometri/150709609688?ref=mf
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