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