1/48 a^{c0,a0,a3}_{} b^{}_{c1,c2,c3,c4} c^{}_{a1,a2,a4} eta1^{a4}_{a3} a+(c1) a+(c2) a+(c3) a+(c4) a+(a1) a+(a2) a-(a0) a-(c0)
-1/48 a^{c0,a1,a2}_{} b^{}_{c1,c2,c3,c4} c^{}_{a0,a3,a4} eta1^{a4}_{a2} eta1^{a3}_{a1} a+(c1) a+(c2) a+(c3) a+(c4) a+(a0) a-(c0)
-1/96 a^{c0,a1,a2}_{} b^{}_{c1,c2,c3,c4} c^{}_{a0,a3,a4} lambda2^{a3,a4}_{a1,a2} a+(c1) a+(c2) a+(c3) a+(c4) a+(a0) a-(c0)