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