1/2 a^{c0}_{v0} b^{c1,a0}_{a1,v1} c^{a3,a4}_{c2,a2} lambda2^{a1,a2}_{a3,a4} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)
-a^{c0}_{v0} b^{c1,a2}_{a1,v1} c^{a0,a4}_{c2,a3} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)
-a^{c0}_{v0} b^{c1,a2}_{a1,v1} c^{a0,a4}_{c2,a3} lambda2^{a1,a3}_{a2,a4} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)