1/8 a^{v1}_{v0} b^{a2,a3}_{a0,a1} c^{c0,c1}_{a4,a5} eta1^{a5}_{a3} eta1^{a4}_{a2} a+(a0) a+(a1) a+(v0) a-(v1) a-(c1) a-(c0)
+1/16 a^{v1}_{v0} b^{a2,a3}_{a0,a1} c^{c0,c1}_{a4,a5} lambda2^{a4,a5}_{a2,a3} a+(a0) a+(a1) a+(v0) a-(v1) a-(c1) a-(c0)
-1/4 a^{v1}_{v0} b^{a3,a4}_{a0,a2} c^{c0,c1}_{a1,a5} lambda2^{a2,a5}_{a3,a4} a+(a0) a+(a1) a+(v0) a-(v1) a-(c1) a-(c0)