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  ______     ___      ______     ___     _    _   
 /_____//   / _ \\   /_   _//   / _ \\  | || | || 
 `____ `   | / \ ||  `-| |,-   / //\ \\ | || | || 
 /___//    | \_/ ||    | ||   |  ___  ||| \\_/ || 
 `__ `      \___//     |_||   |_||  |_|| \____//  
 /_//       `---`      `-`'   `-`   `-`   `---`   
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Text this: Polynomial forms of typical interatomic potential functions