-1/4 a^{}_{c0,a0,a1,a2} b^{c1,c2,a3,v0}_{} gamma1^{a2}_{a3} a+(c0) a+(a0) a+(a1) a-(v0) a-(c2) a-(c1)
-1/6 a^{}_{c1,a0,a1,a2} b^{c0,c1,a3,v0}_{} a+(a0) a+(a1) a+(a2) a-(v0) a-(a3) a-(c0)
+1/2 a^{}_{c1,a0,a1,a2} b^{c0,c1,a3,v0}_{} gamma1^{a2}_{a3} a+(a0) a+(a1) a-(v0) a-(c0)