-1/8 a^{a0}_{a1} b^{c0,c1}_{v0,v1} c^{a3,a4}_{c2,a2} lambda2^{a1,a2}_{a3,a4} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)
+1/4 a^{a2}_{a1} b^{c0,c1}_{v0,v1} c^{a0,a4}_{c2,a3} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)
+1/4 a^{a2}_{a1} b^{c0,c1}_{v0,v1} c^{a0,a4}_{c2,a3} lambda2^{a1,a3}_{a2,a4} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)