Describir: A brief course in analytic geometry :

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