-1/2 a^{a0,a1}_{a3,v0} b^{c1,a2}_{c0,c3} c^{c3,a4}_{c2,v1} gamma1^{a3}_{a4} a+(c0) a+(c2) a+(v0) a+(v1) a-(a2) a-(a1) a-(a0) a-(c1)
+1/2 a^{a0,a1}_{a3,v0} b^{c1,a4}_{c0,c3} c^{c3,a2}_{c2,v1} gamma1^{a3}_{a4} a+(c0) a+(c2) a+(v0) a+(v1) a-(a2) a-(a1) a-(a0) a-(c1)