Text this: Star Product on the Euclidean Motion Group in the Plane

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