-1/4 a^{c2,a0}_{c0,c1} b^{c4}_{c3} c^{a3,v0}_{a1,a2} lambda2^{a1,a2}_{a0,a3} a+(c0) a+(c1) a+(c3) a-(v0) a-(c4) a-(c2)
-1/2 a^{c1,a0}_{c0,c3} b^{c3}_{c2} c^{a3,v0}_{a1,a2} lambda2^{a1,a2}_{a0,a3} a+(c0) a+(c2) a-(v0) a-(c1)
+a^{c1,a2}_{c0,c3} b^{c3}_{c2} c^{a1,v0}_{a0,a3} eta1^{a3}_{a2} a+(c0) a+(c2) a+(a0) a-(v0) a-(a1) a-(c1)