1/4 a^{a0,a1}_{c0,c1} b^{c0,c1}_{a2,v0} c^{a3}_{v1} a+(a2) a+(v0) a+(v1) a-(a3) a-(a1) a-(a0)
+1/4 a^{a0,a1}_{c0,c1} b^{c0,c1}_{a2,v0} c^{a3}_{v1} gamma1^{a2}_{a3} a+(v0) a+(v1) a-(a1) a-(a0)
+1/2 a^{a0,a2}_{c0,c1} b^{c0,c1}_{a3,v0} c^{a1}_{v1} eta1^{a3}_{a2} a+(v0) a+(v1) a-(a1) a-(a0)
+1/2 a^{a0,a1}_{c0,c2} b^{c1,c2}_{a2,v0} c^{a3}_{v1} gamma1^{a2}_{a3} a+(c0) a+(v0) a+(v1) a-(a1) a-(a0) a-(c1)
+a^{a0,a2}_{c0,c2} b^{c1,c2}_{a3,v0} c^{a1}_{v1} eta1^{a3}_{a2} a+(c0) a+(v0) a+(v1) a-(a1) a-(a0) a-(c1)