-1/2 a^{c0,c1}_{c3,a1} b^{c2,a2}_{a0,v0} c^{c3}_{v1} gamma1^{a1}_{a2} a+(a0) a+(v0) a+(v1) a-(c2) a-(c1) a-(c0)
+1/2 a^{c0,c1}_{c3,a1} b^{c3,a2}_{a0,v0} c^{c2}_{v1} gamma1^{a1}_{a2} a+(a0) a+(v0) a+(v1) a-(c2) a-(c1) a-(c0)