-1/2 a^{c0,a0,a1}_{v0} b^{a4}_{c1,a2,a3} lambda2^{a2,a3}_{a1,a4} a+(c1) a+(v0) a-(a0) a-(c0)
+a^{c0,a0,a3}_{v0} b^{a2}_{c1,a1,a4} eta1^{a4}_{a3} a+(c1) a+(a1) a+(v0) a-(a2) a-(a0) a-(c0)
-1/2 a^{c0,a1,a2}_{v0} b^{a0}_{c1,a3,a4} eta1^{a4}_{a2} eta1^{a3}_{a1} a+(c1) a+(v0) a-(a0) a-(c0)
-1/4 a^{c0,a1,a2}_{v0} b^{a0}_{c1,a3,a4} lambda2^{a3,a4}_{a1,a2} a+(c1) a+(v0) a-(a0) a-(c0)