1/4 a^{v0}_{c0} b^{v1,v2}_{c3,a0} c^{c3,a1}_{c1,c2} gamma1^{a0}_{a1} a+(c0) a+(c1) a+(c2) a-(v2) a-(v1) a-(v0)
-1/4 a^{v0}_{c3} b^{v1,v2}_{c0,a0} c^{c3,a1}_{c1,c2} gamma1^{a0}_{a1} a+(c0) a+(c1) a+(c2) a-(v2) a-(v1) a-(v0)