Fen Fakültesi

x https://www.youtube.com/watch?v=MV052zXdgTI&index=4&list=PL5B3KLQNAC5gW9BVRqytSdXuHDWWrJhU2   x https://www.youtube.com/watch?v=YHLROgC-lDo&list=PL5B3KLQNAC5gW9BVRqytSdXuHDWWrJhU2&index=3   x https://www.youtube.com/watch?v=j6nd-VkmUOA&list=PL5B3KLQNAC5gW9BVRqytSdXuHDWWrJhU2&index=2        

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