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