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