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