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