1/4 a^{c0,a0}_{a3,v0} b^{a1,a2}_{c1,c4} c^{c4,a4}_{c2,c3} gamma1^{a3}_{a4} a+(c1) a+(c2) a+(c3) a+(v0) a-(a2) a-(a1) a-(a0) a-(c0)
-1/2 a^{c0,a0}_{a3,v0} b^{a1,a4}_{c1,c4} c^{c4,a2}_{c2,c3} gamma1^{a3}_{a4} a+(c1) a+(c2) a+(c3) a+(v0) a-(a2) a-(a1) a-(a0) a-(c0)