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