6 3 12 m *n - p
m^6*n^3 - p^12
-p^12 + m^6*n^3
/ 4 2\ / 8 4 2 2 4\ -\p - n*m /*\p + m *n + n*m *p /
-(p^4 - n*m^2)*(p^8 + m^4*n^2 + n*m^2*p^4)