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