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