9.466 - 29.78 \eta - 35.38 \chi_+ + 404.6 \eta \chi_+ + 62.3 \eta \chi_- + 35.06 \chi_+^2 + 36.65 \chi_-^2 - 1021 \eta^2 \chi_+ - 264.3 \eta^2 \chi_- - 122 \eta \chi_+^2 - 155.2 \eta \chi_-^2 + 18.1 \chi_+^2 \chi_-