Text this: The nonlinear product of the bessel diamond operator and the bessel klein-gordon operator related to the bessel biharmonic equation

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