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