1/8 a^{a1,a2}_{c0,a0} b^{c1}_{a3} c^{c2,c3}_{v0,v1} lambda2^{a0,a3}_{a1,a2} a+(c0) a+(v0) a+(v1) a-(c3) a-(c2) a-(c1)
-1/2 a^{a1,a2}_{c2,a0} b^{c0}_{a3} c^{c1,c2}_{v0,v1} eta1^{a3}_{a2} a+(a0) a+(v0) a+(v1) a-(a1) a-(c1) a-(c0)
+1/4 a^{a1,a2}_{c2,a0} b^{c0}_{a3} c^{c1,c2}_{v0,v1} lambda2^{a0,a3}_{a1,a2} a+(v0) a+(v1) a-(c1) a-(c0)
-1/4 a^{a1,a2}_{c2,a0} b^{c2}_{a3} c^{c0,c1}_{v0,v1} eta1^{a3}_{a2} a+(a0) a+(v0) a+(v1) a-(a1) a-(c1) a-(c0)
+1/8 a^{a1,a2}_{c2,a0} b^{c2}_{a3} c^{c0,c1}_{v0,v1} lambda2^{a0,a3}_{a1,a2} a+(v0) a+(v1) a-(c1) a-(c0)