z z*z - - 2 -----------*z z*z - z + 1 ------------- z - 1/2
(((z*z - z/2)/(z*z - z + 1))*z)/(z - 1/2)
/ 2\ 2*z*\-z + 2*z / --------------------------- / 2\ (-1 + 2*z)*\2 - 2*z + 2*z /
2*z*(-z + 2*z^2)/((-1 + 2*z)*(2 - 2*z + 2*z^2))
z*(z^2 - 0.5*z)/((-0.5 + z)*(1.0 + z^2 - z))
z*(z^2 - 0.5*z)/((-0.5 + z)*(1.0 + z^2 - z))
/ 2 z\ z*|z - -| \ 2/ ----------------------- / 2 \ (-1/2 + z)*\1 + z - z/
z*(z^2 - z/2)/((-1/2 + z)*(1 + z^2 - z))
/ 2 z\ z*|z - -| \ 2/ ----------------------- / 2 \ (-1/2 + z)*\1 + z - z/
z*(z^2 - z/2)/((-1/2 + z)*(1 + z^2 - z))
/ 2 z\ z*|z - -| \ 2/ ----------------------- / 2 \ (-1/2 + z)*\1 + z - z/
z*(z^2 - z/2)/((-1/2 + z)*(1 + z^2 - z))