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