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