1/4 a^{c2,c3}_{c0,c1} b^{a1}_{c5} c^{c4,c5}_{a0,a2} eta1^{a2}_{a1} a+(c0) a+(c1) a+(a0) a-(c4) a-(c3) a-(c2)
+1/4 a^{c1,c2}_{c0,c3} b^{a0}_{c4} c^{c3,c4}_{a1,a2} a+(c0) a+(a1) a+(a2) a-(a0) a-(c2) a-(c1)
-1/2 a^{c1,c2}_{c0,c3} b^{a1}_{c4} c^{c3,c4}_{a0,a2} eta1^{a2}_{a1} a+(c0) a+(a0) a-(c2) a-(c1)
-1/2 a^{c1,c2}_{c0,c5} b^{a1}_{c3} c^{c4,c5}_{a0,a2} eta1^{a2}_{a1} a+(c0) a+(c3) a+(a0) a-(c4) a-(c2) a-(c1)
+1/8 a^{c0,c1}_{c3,c4} b^{a0}_{c2} c^{c3,c4}_{a1,a2} a+(c2) a+(a1) a+(a2) a-(a0) a-(c1) a-(c0)
-1/4 a^{c0,c1}_{c3,c4} b^{a1}_{c2} c^{c3,c4}_{a0,a2} eta1^{a2}_{a1} a+(c2) a+(a0) a-(c1) a-(c0)