1/4 a^{a0,v0}_{c0,a3} b^{a1,a2}_{c1,c2} c^{a4}_{v0} gamma1^{a3}_{a4} a+(c0) a+(c1) a+(c2) a-(a2) a-(a1) a-(a0)
-1/2 a^{a0,v0}_{c0,a3} b^{a1,a4}_{c1,c2} c^{a2}_{v0} gamma1^{a3}_{a4} a+(c0) a+(c1) a+(c2) a-(a2) a-(a1) a-(a0)