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