a^{a0}_{v0} b^{v1}_{a1} c^{a2}_{v1} gamma1^{a1}_{a2} a+(v0) a-(a0)
+a^{a1}_{v0} b^{v1}_{a2} c^{a0}_{v1} eta1^{a2}_{a1} a+(v0) a-(a0)