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