a^{c0,a1}_{a0,v0} b^{}_{} c^{c1,a3}_{a2,v1} eta1^{a2}_{a1} gamma1^{a0}_{a3} a+(v0) a+(v1) a-(c1) a-(c0)
+a^{c0,a1}_{a0,v0} b^{}_{} c^{c1,a3}_{a2,v1} lambda2^{a0,a2}_{a1,a3} a+(v0) a+(v1) a-(c1) a-(c0)