-a^{v1}_{a1} b^{c0}_{v0} c^{a0,a2}_{c1,v1} gamma1^{a1}_{a2} a+(c1) a+(v0) a-(a0) a-(c0)
+a^{v1}_{a1} b^{c0}_{v1} c^{a0,a2}_{c1,v0} gamma1^{a1}_{a2} a+(c1) a+(v0) a-(a0) a-(c0)