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