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