1/4 a^{c0,c1}_{c3,a0} b^{c3,v0}_{c2,a3} c^{a4,v1}_{a1,a2} gamma1^{a3}_{a4} a+(c2) a+(a0) a+(a1) a+(a2) a-(v1) a-(v0) a-(c1) a-(c0)
-1/4 a^{c0,c1}_{c3,a3} b^{c3,v0}_{c2,a0} c^{a4,v1}_{a1,a2} gamma1^{a3}_{a4} a+(c2) a+(a0) a+(a1) a+(a2) a-(v1) a-(v0) a-(c1) a-(c0)