1/4 a^{a2,a3}_{a0,a1} b^{c1}_{c0} c^{c2,c3}_{a4,v0} lambda2^{a1,a4}_{a2,a3} a+(c0) a+(a0) a+(v0) a-(c3) a-(c2) a-(c1)
+1/2 a^{a2,a3}_{a0,a1} b^{c0}_{c2} c^{c1,c2}_{a4,v0} eta1^{a4}_{a3} a+(a0) a+(a1) a+(v0) a-(a2) a-(c1) a-(c0)
+1/2 a^{a2,a3}_{a0,a1} b^{c0}_{c2} c^{c1,c2}_{a4,v0} lambda2^{a1,a4}_{a2,a3} a+(a0) a+(v0) a-(c1) a-(c0)