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