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