1/2 a^{a0}_{a3} b^{a1,a2}_{c1,v0} c^{c1,a4}_{c0,v1} gamma1^{a3}_{a4} a+(c0) a+(v0) a+(v1) a-(a2) a-(a1) a-(a0)
-a^{a0}_{a3} b^{a1,a4}_{c1,v0} c^{c1,a2}_{c0,v1} gamma1^{a3}_{a4} a+(c0) a+(v0) a+(v1) a-(a2) a-(a1) a-(a0)