-a^{c0,v0}_{c2,a0} b^{c2,v1}_{a1,a2} c^{a3}_{c1} gamma1^{a2}_{a3} a+(c1) a+(a0) a+(a1) a-(v1) a-(v0) a-(c0)
-1/2 a^{c0,v0}_{c2,a2} b^{c2,v1}_{a0,a1} c^{a3}_{c1} gamma1^{a2}_{a3} a+(c1) a+(a0) a+(a1) a-(v1) a-(v0) a-(c0)