1/4 a^{v0}_{a1} b^{a3,a4}_{a0,a2} c^{c0,v3}_{v1,v2} lambda2^{a1,a2}_{a3,a4} a+(a0) a+(v1) a+(v2) a-(v3) a-(v0) a-(c0)
+1/2 a^{v2}_{a1} b^{a3,a4}_{a0,a2} c^{c0,v1}_{v0,v2} lambda2^{a1,a2}_{a3,a4} a+(a0) a+(v0) a-(v1) a-(c0)
-1/2 a^{v2}_{a3} b^{a2,a4}_{a0,a1} c^{c0,v1}_{v0,v2} gamma1^{a3}_{a4} a+(a0) a+(a1) a+(v0) a-(v1) a-(a2) a-(c0)