發送短信 : The generalized solutions of a certain n order differential equations with polynomial coefficients

  ____      ______    _____      ___     ______   
 |  _ \\   /_   _//  / ____||   / _ \\  |      \\ 
 | |_| ||   -| ||-  / //---`'  | / \ || |  --  // 
 | .  //    _| ||_  \ \\___    | \_/ || |  --  \\ 
 |_|\_\\   /_____//  \_____||   \___//  |______// 
 `-` --`   `-----`    `----`    `---`   `------`