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