-1/8 a^{c0,v1}_{a1,v0} b^{a3,a4}_{a0,a2} c^{c1,c2}_{v2,v3} lambda2^{a1,a2}_{a3,a4} a+(a0) a+(v0) a+(v2) a+(v3) a-(v1) a-(c2) a-(c1) a-(c0)
+1/4 a^{c0,v2}_{a1,v0} b^{a3,a4}_{a0,a2} c^{c1,c2}_{v1,v2} lambda2^{a1,a2}_{a3,a4} a+(a0) a+(v0) a+(v1) a-(c2) a-(c1) a-(c0)
-1/4 a^{c0,v2}_{a3,v0} b^{a2,a4}_{a0,a1} c^{c1,c2}_{v1,v2} gamma1^{a3}_{a4} a+(a0) a+(a1) a+(v0) a+(v1) a-(a2) a-(c2) a-(c1) a-(c0)