1/2 a^{c0}_{a1} b^{a0}_{c1} c^{a3,a4}_{c2,a2} lambda2^{a1,a2}_{a3,a4} a+(c1) a+(c2) a-(a0) a-(c0)
-a^{c0}_{a1} b^{a2}_{c1} c^{a0,a4}_{c2,a3} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c1) a+(c2) a-(a0) a-(c0)
-a^{c0}_{a1} b^{a2}_{c1} c^{a0,a4}_{c2,a3} lambda2^{a1,a3}_{a2,a4} a+(c1) a+(c2) a-(a0) a-(c0)