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