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 _    _    _    _    _    _      ___    __    __  
| |  | || | || | || | || | ||   / _ \\  \ \\ / // 
| |/\| || | || | || | || | ||  / //\ \\  \ \/ //  
|  /\  || | \\_/ || | \\_/ || |  ___  ||  \  //   
|_// \_||  \____//   \____//  |_||  |_||   \//    
`-`   `-`   `---`     `---`   `-`   `-`     `

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發送短信 : Handwritten mathematical expression recognition