-1/2 a^{v0}_{c0} b^{c1,a1}_{a0,v0} c^{c3,c4}_{c2,a2} eta1^{a2}_{a1} a+(c0) a+(c2) a+(a0) a-(c4) a-(c3) a-(c1)
+a^{v0}_{c3} b^{c0,a1}_{a0,v0} c^{c2,c3}_{c1,a2} a+(c1) a+(a0) a+(a2) a-(a1) a-(c2) a-(c0)
-a^{v0}_{c3} b^{c0,a1}_{a0,v0} c^{c2,c3}_{c1,a2} eta1^{a2}_{a1} a+(c1) a+(a0) a-(c2) a-(c0)
+1/2 a^{v0}_{c3} b^{c3,a1}_{a0,v0} c^{c1,c2}_{c0,a2} a+(c0) a+(a0) a+(a2) a-(a1) a-(c2) a-(c1)
-1/2 a^{v0}_{c3} b^{c3,a1}_{a0,v0} c^{c1,c2}_{c0,a2} eta1^{a2}_{a1} a+(c0) a+(a0) a-(c2) a-(c1)
+a^{v0}_{c3} b^{c0,a1}_{a0,v1} c^{c2,c3}_{c1,a2} eta1^{a2}_{a1} a+(c1) a+(a0) a+(v1) a-(v0) a-(c2) a-(c0)
+1/2 a^{v0}_{c3} b^{c3,a1}_{a0,v1} c^{c1,c2}_{c0,a2} eta1^{a2}_{a1} a+(c0) a+(a0) a+(v1) a-(v0) a-(c2) a-(c1)