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