a^{a0}_{v0} b^{a2}_{a1} c^{c0}_{a3} eta1^{a3}_{a2} eta1^{a1}_{a0} a+(v0) a-(c0)
+a^{a0}_{v0} b^{a2}_{a1} c^{c0}_{a3} lambda2^{a1,a3}_{a0,a2} a+(v0) a-(c0)