1/2 a^{c1}_{c0} b^{v0,v1}_{c3,a1} c^{c3,a2}_{c2,a0} gamma1^{a1}_{a2} a+(c0) a+(c2) a+(a0) a-(v1) a-(v0) a-(c1)
-1/2 a^{c0}_{c3} b^{v0,v1}_{c1,a1} c^{c3,a2}_{c2,a0} gamma1^{a1}_{a2} a+(c1) a+(c2) a+(a0) a-(v1) a-(v0) a-(c0)