-1/48 a^{a0}_{} b^{}_{c0,c1,c2,c3} c^{a3}_{a1,a2} lambda2^{a1,a2}_{a0,a3} a+(c0) a+(c1) a+(c2) a+(c3)
-1/24 a^{a2}_{} b^{}_{c0,c1,c2,c3} c^{a1}_{a0,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a+(c2) a+(c3) a+(a0) a-(a1)