4 2 m - 12*m + 16
m^4 - 12*m^2 + 16 при m = -1/2
m^4 - 12*m^2 + 16
(-1/2)^4 - 12*(-1/2)^2 + 16
209/16
16.0 + m^4 - 12.0*m^2
2 / 2\ 16 + m *\-12 + m /
/ 2 \ / 2 \ \-4 + m - 2*m/*\-4 + m + 2*m/