1/2 a^{a0}_{a3} b^{a1,v0}_{c0,c1} c^{a2,a4}_{c2,v0} gamma1^{a3}_{a4} a+(c0) a+(c1) a+(c2) a-(a2) a-(a1) a-(a0)
+1/4 a^{a0}_{a3} b^{a4,v0}_{c0,c1} c^{a1,a2}_{c2,v0} gamma1^{a3}_{a4} a+(c0) a+(c1) a+(c2) a-(a2) a-(a1) a-(a0)