1/2 a^{c0}_{a2} b^{a0,a1}_{c1,c3} c^{c3,a3}_{c2,v0} gamma1^{a2}_{a3} a+(c1) a+(c2) a+(v0) a-(a1) a-(a0) a-(c0)
-a^{c0}_{a2} b^{a0,a3}_{c1,c3} c^{c3,a1}_{c2,v0} gamma1^{a2}_{a3} a+(c1) a+(c2) a+(v0) a-(a1) a-(a0) a-(c0)