-1/2 a^{c0,a0}_{c1,a2} b^{c1,a1}_{v0,v1} c^{a3}_{v2} gamma1^{a2}_{a3} a+(v0) a+(v1) a+(v2) a-(a1) a-(a0) a-(c0)
+1/2 a^{c0,a0}_{c1,a2} b^{c1,a3}_{v0,v1} c^{a1}_{v2} gamma1^{a2}_{a3} a+(v0) a+(v1) a+(v2) a-(a1) a-(a0) a-(c0)