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