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