-1/2 a^{a0}_{c0} b^{c0,a3}_{a1,a2} c^{}_{} lambda2^{a1,a2}_{a0,a3}
-1/2 a^{a0}_{c0} b^{c1,a3}_{a1,a2} c^{}_{} lambda2^{a1,a2}_{a0,a3} a+(c0) a-(c1)
-a^{a2}_{c0} b^{c0,a1}_{a0,a3} c^{}_{} eta1^{a3}_{a2} a+(a0) a-(a1)