3.363 - 6.907 \eta - 5.204 \chi_+ + 26.98 \eta^2 + 41.15 \eta \chi_+ + 2.266 \chi_+^2 - 88.85 \eta^2 \chi_+ - 13.29 \eta \chi_+^2 - 0.8613 \eta \chi_-^2 - 1.767 \chi_+^3 - 0.2526 \chi_-^3