-1/2 a^{v0,v1}_{c0,a1} b^{a0,a2}_{c1,c3} c^{c3}_{c2} gamma1^{a1}_{a2} a+(c0) a+(c1) a+(c2) a-(v1) a-(v0) a-(a0)
-1/4 a^{v0,v1}_{c3,a1} b^{a0,a2}_{c0,c1} c^{c3}_{c2} gamma1^{a1}_{a2} a+(c0) a+(c1) a+(c2) a-(v1) a-(v0) a-(a0)