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

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Text this: Eisenstein series in Ramanujan's lost notebook