-1/2 a^{c0,a0}_{c2,a2} b^{c2,a1}_{v0,v1} c^{a3}_{c1} gamma1^{a2}_{a3} a+(c1) a+(v0) a+(v1) a-(a1) a-(a0) a-(c0)
+1/2 a^{c0,a0}_{c2,a2} b^{c2,a3}_{v0,v1} c^{a1}_{c1} gamma1^{a2}_{a3} a+(c1) a+(v0) a+(v1) a-(a1) a-(a0) a-(c0)