-a^{c0,a2}_{a0,a1} b^{c2,a4}_{c1,a3} c^{}_{} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c1) a+(a0) a-(c2) a-(c0)
-a^{c0,a2}_{a0,a1} b^{c2,a4}_{c1,a3} c^{}_{} lambda2^{a1,a3}_{a2,a4} a+(c1) a+(a0) a-(c2) a-(c0)
-1/2 a^{c0,a3}_{a1,a2} b^{c2,a4}_{c1,a0} c^{}_{} lambda2^{a1,a2}_{a3,a4} a+(c1) a+(a0) a-(c2) a-(c0)