1/2 a^{c0,v1}_{a0,v0} b^{c2,c3}_{c1,a1} c^{a2}_{v1} gamma1^{a1}_{a2} a+(c1) a+(a0) a+(v0) a-(c3) a-(c2) a-(c0)
-1/2 a^{c0,v1}_{a1,v0} b^{c2,c3}_{c1,a0} c^{a2}_{v1} gamma1^{a1}_{a2} a+(c1) a+(a0) a+(v0) a-(c3) a-(c2) a-(c0)