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  • openstudy.com
    • study together .Get Help. Meet Students.

      Itís a free community.

      Ask questions. Give help. Earn medals. Make friends.
      1 million students + 160 countries + 190 study groups = Serious Fun

      سایتی جهت پرسش و پاسخ درزمینه ریاضی و فیزیک  و... بساده و صمیمی

      http://openstudy.com/users/amoodarya

  • http://stackexchange.com/
    • expert answers to your questions

      Stack Exchange is a fast-growing network of 110 question and answer sites on diverse topics from software programming to cooking to photography and gaming. We build libraries of high-quality questions and answers, focused on the most important topics in each area of expertise. From our core of Q&A, to community blogs and real-time chat, we provide experts with the tools they need to make The Internet a better place.

      سایتی جهت پرسش و پاسخ درزمینه ریاضی و المپیاد و... بسیار حرفه ای بیشتر برای بعد از لیسانس مفیده

       profile for khosrotash on Stack Exchange, a network of free, community-driven Q&A sites

  • bluebit.gr/matrix-calculator/
    • محاسبات ماتریسی خیلی ساده و کارآمد و در عین حال حرفه ای

 

 

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