-1/4 a^{c1,c2}_{c0,a2} b^{a3,v0}_{a0,a1} c^{c3}_{v0} gamma1^{a2}_{a3} a+(c0) a+(a0) a+(a1) a-(c3) a-(c2) a-(c1)
-1/4 a^{c0,c1}_{c2,a0} b^{a3,v0}_{a1,a2} c^{c2}_{v0} a+(a0) a+(a1) a+(a2) a-(a3) a-(c1) a-(c0)
-1/4 a^{c0,c1}_{c2,a2} b^{a3,v0}_{a0,a1} c^{c2}_{v0} gamma1^{a2}_{a3} a+(a0) a+(a1) a-(c1) a-(c0)
+1/4 a^{c0,c1}_{c2,a2} b^{a3,v0}_{a0,a1} c^{c2}_{v1} gamma1^{a2}_{a3} a+(a0) a+(a1) a+(v1) a-(v0) a-(c1) a-(c0)