Describir: Integration of ordinary differential equations

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