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