Akm = {{2, 0, (5/21)*((sqrt(21))*(Mb) + (-1)*((sqrt(21))*(Me1)) + (-1)*((sqrt(35))*(Me2)))} , 
       {4, 0, (3/28)*((4)*((sqrt(21))*(Mb)) + (3)*((sqrt(21))*(Me1)) + (3)*((sqrt(35))*(Me2)))} , 
       {4,-4, (3/40)*((5)*((sqrt(30))*(Me1)) + (-15)*((sqrt(2))*(Me2)) + (-8*I)*((sqrt(30))*(Me3)))} , 
       {4, 4, (3/40)*((5)*((sqrt(30))*(Me1)) + (-15)*((sqrt(2))*(Me2)) + (8*I)*((sqrt(30))*(Me3)))} }