1/2 a^{v2}_{a1} b^{c0,a2}_{a0,v0} c^{c1,c2}_{v1,v2} gamma1^{a1}_{a2} a+(a0) a+(v0) a+(v1) a-(c2) a-(c1) a-(c0)
+1/4 a^{v2}_{a1} b^{c0,a2}_{a0,v2} c^{c1,c2}_{v0,v1} gamma1^{a1}_{a2} a+(a0) a+(v0) a+(v1) a-(c2) a-(c1) a-(c0)