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            _____     _____      ___     _    _   
    ___    |  ___||  /  ___||   / _ \\  | |  | || 
   /   ||  | ||__   | // __    | / \ || | |/\| || 
  | [] ||  | ||__   | \\_\ ||  | \_/ || |  /\  || 
   \__ ||  |_____||  \____//    \___//  |_// \_|| 
    -|_||  `-----`    `---`     `---`   `-`   `-` 
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發送短信 : Aspects of Mathematical Modelling