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