-1/4 a^{c0}_{v0} b^{a0,a2}_{c1,c2} c^{a1,a5}_{a3,a4} lambda2^{a3,a4}_{a2,a5} a+(c1) a+(c2) a+(v0) a-(a1) a-(a0) a-(c0)
+1/8 a^{c0}_{v0} b^{a2,a3}_{c1,c2} c^{a0,a1}_{a4,a5} eta1^{a5}_{a3} eta1^{a4}_{a2} a+(c1) a+(c2) a+(v0) a-(a1) a-(a0) a-(c0)
+1/16 a^{c0}_{v0} b^{a2,a3}_{c1,c2} c^{a0,a1}_{a4,a5} lambda2^{a4,a5}_{a2,a3} a+(c1) a+(c2) a+(v0) a-(a1) a-(a0) a-(c0)