1/4 a^{}_{c0,a0,a1,v0} b^{c0,a4}_{a2,a3} a+(a0) a+(a1) a+(a2) a+(a3) a+(v0) a-(a4)
-1/2 a^{}_{c0,a0,a3,v0} b^{c0,a4}_{a1,a2} gamma1^{a3}_{a4} a+(a0) a+(a1) a+(a2) a+(v0)
-1/2 a^{}_{c0,a0,a3,v0} b^{c1,a4}_{a1,a2} gamma1^{a3}_{a4} a+(c0) a+(a0) a+(a1) a+(a2) a+(v0) a-(c1)