-a^{v2}_{v0} b^{c0,a0}_{a1,v1} c^{a2}_{v2} gamma1^{a1}_{a2} a+(v0) a+(v1) a-(a0) a-(c0)
+a^{v2}_{v0} b^{c0,a0}_{a1,v2} c^{a2}_{v1} gamma1^{a1}_{a2} a+(v0) a+(v1) a-(a0) a-(c0)