1/2 a^{c2,a1}_{c0,c1} b^{c3}_{c4} c^{c4,v0}_{a0,a2} eta1^{a2}_{a1} a+(c0) a+(c1) a+(a0) a-(v0) a-(c3) a-(c2)
+1/2 a^{c1,a0}_{c0,c2} b^{c2}_{c3} c^{c3,v0}_{a1,a2} a+(c0) a+(a1) a+(a2) a-(v0) a-(a0) a-(c1)
+a^{c1,a1}_{c0,c2} b^{c2}_{c3} c^{c3,v0}_{a0,a2} eta1^{a2}_{a1} a+(c0) a+(a0) a-(v0) a-(c1)
-a^{c1,a1}_{c0,c4} b^{c3}_{c2} c^{c4,v0}_{a0,a2} eta1^{a2}_{a1} a+(c0) a+(c2) a+(a0) a-(v0) a-(c3) a-(c1)
+a^{c1,a1}_{c0,c4} b^{c4}_{c2} c^{c3,v0}_{a0,a2} eta1^{a2}_{a1} a+(c0) a+(c2) a+(a0) a-(v0) a-(c3) a-(c1)
+1/2 a^{c0,a0}_{c2,c3} b^{c2}_{c1} c^{c3,v0}_{a1,a2} a+(c1) a+(a1) a+(a2) a-(v0) a-(a0) a-(c0)
+a^{c0,a1}_{c2,c3} b^{c2}_{c1} c^{c3,v0}_{a0,a2} eta1^{a2}_{a1} a+(c1) a+(a0) a-(v0) a-(c0)