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

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Text this: Eisenstein series in Ramanujan's lost notebook