-1/2 a^{c1,v2}_{c0,a0} b^{v0,v1}_{a1,v2} c^{a2}_{c2} gamma1^{a1}_{a2} a+(c0) a+(c2) a+(a0) a-(v1) a-(v0) a-(c1)
+1/2 a^{c1,v2}_{c0,a1} b^{v0,v1}_{a0,v2} c^{a2}_{c2} gamma1^{a1}_{a2} a+(c0) a+(c2) a+(a0) a-(v1) a-(v0) a-(c1)