2 2 m - 4*m*n + 4*n ----------------- 2 2 m - 4*n
(m^2 - 4*m*n + 4*n^2)/(m^2 - 4*n^2)
(m^2 + 4.0*n^2 - 4.0*m*n)/(m^2 - 4.0*n^2)
(m^2 + 4.0*n^2 - 4.0*m*n)/(m^2 - 4.0*n^2)
2 2 m + 4*n - 4*m*n ----------------- 2 2 m - 4*n
(m^2 + 4*n^2 - 4*m*n)/(m^2 - 4*n^2)
2 2 m + 4*n - 4*m*n ----------------- 2 2 m - 4*n
(m^2 + 4*n^2 - 4*m*n)/(m^2 - 4*n^2)
2 2 m + 4*n - 4*m*n ----------------- 2 2 m - 4*n
(m^2 + 4*n^2 - 4*m*n)/(m^2 - 4*n^2)
2 4*n + m*(m - 4*n) ------------------ 2 2 m - 4*n
(4*n^2 + m*(m - 4*n))/(m^2 - 4*n^2)
2 2 m + 4*n - 4*m*n ----------------- 2 2 m - 4*n
(m^2 + 4*n^2 - 4*m*n)/(m^2 - 4*n^2)