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  ______    ______     _____    _____    ______   
 /_   _//  /_   _//   / ___//  |  ___|| |      \\ 
 `-| |,-    -| ||-    \___ \\  | ||__   |  --  // 
   | ||     _| ||_    /    //  | ||__   |  --  \\ 
   |_||    /_____//  /____//   |_____|| |______// 
   `-`'    `-----`  `-----`    `-----`  `------`

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發送短信 : Mathematics-Its place in the real world