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