1/2 a^{v1}_{a0} b^{c1,c2}_{c0,a2} c^{a3,v0}_{a1,v1} gamma1^{a2}_{a3} a+(c0) a+(a0) a+(a1) a-(v0) a-(c2) a-(c1)
-1/2 a^{v1}_{a2} b^{c1,c2}_{c0,a0} c^{a3,v0}_{a1,v1} gamma1^{a2}_{a3} a+(c0) a+(a0) a+(a1) a-(v0) a-(c2) a-(c1)