(Z4+Z3-Z2-Z-2) : ( Z2+1) = Z2+...
(Z2+1) · Z2 = (Z4+Z2)
(Z4+Z3-Z2-Z-2) - (Z4+Z2) = (Z3-2Z2-Z-2)
-----------------------------------------------------------------
(Z3-2Z2-Z-2) : (Z2+1) = Z+...
(Z2+1) · Z= (Z3+Z)
(Z3-2Z2-Z-2)-(Z3+Z)=(-2Z2-2Z-2)
-----------------------------------------------------------------
(-2Z2-2Z-2) : (Z2+1) = -2+...
(Z2+1) ·(-2) = (-2Z2+2)
(-2Z2-2Z-2)-(-2Z2+2)=-2Z-4
-----------------------------------------------------------------
(Z4+Z3-Z2-Z-2) : (Z2+1) = Z2+Z-2+(2Z-4)/(-2Z2+2)