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