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