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