1/2 a^{c1,a1}_{c0,c5} b^{c2,c3}_{a0,a2} c^{c5}_{c4} eta1^{a2}_{a1} a+(c0) a+(c4) a+(a0) a-(c3) a-(c2) a-(c1)
-a^{c1,a1}_{c0,c5} b^{c2,c5}_{a0,a2} c^{c4}_{c3} eta1^{a2}_{a1} a+(c0) a+(c3) a+(a0) a-(c4) a-(c2) a-(c1)
-1/2 a^{c0,a0}_{c3,c4} b^{c1,c3}_{a1,a2} c^{c4}_{c2} a+(c2) a+(a1) a+(a2) a-(a0) a-(c1) a-(c0)
-1/4 a^{c0,a0}_{c3,c4} b^{c3,c4}_{a1,a2} c^{c2}_{c1} a+(c1) a+(a1) a+(a2) a-(a0) a-(c2) a-(c0)
+a^{c0,a1}_{c3,c4} b^{c1,c3}_{a0,a2} c^{c4}_{c2} eta1^{a2}_{a1} a+(c2) a+(a0) a-(c1) a-(c0)
+1/2 a^{c0,a1}_{c3,c4} b^{c3,c4}_{a0,a2} c^{c2}_{c1} eta1^{a2}_{a1} a+(c1) a+(a0) a-(c2) a-(c0)