-1/2 a^{a0,v1}_{c0,v0} b^{c1,a3}_{a1,a2} c^{c3}_{c2} lambda2^{a1,a2}_{a0,a3} a+(c0) a+(c2) a+(v0) a-(v1) a-(c3) a-(c1)
+1/2 a^{a0,v1}_{c2,v0} b^{c0,a3}_{a1,a2} c^{c2}_{c1} lambda2^{a1,a2}_{a0,a3} a+(c1) a+(v0) a-(v1) a-(c0)
-1/2 a^{a0,v1}_{c2,v0} b^{c2,a3}_{a1,a2} c^{c1}_{c0} lambda2^{a1,a2}_{a0,a3} a+(c0) a+(v0) a-(v1) a-(c1)
+a^{a2,v1}_{c2,v0} b^{c0,a1}_{a0,a3} c^{c2}_{c1} eta1^{a3}_{a2} a+(c1) a+(a0) a+(v0) a-(v1) a-(a1) a-(c0)
-a^{a2,v1}_{c2,v0} b^{c2,a1}_{a0,a3} c^{c1}_{c0} eta1^{a3}_{a2} a+(c0) a+(a0) a+(v0) a-(v1) a-(a1) a-(c1)