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

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Text this: Function algebra on a disk