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