-1/2 a^{a1,a2}_{c0,a0} b^{c2,v0}_{c1,c3} c^{c3}_{v0} a+(c0) a+(c1) a+(a0) a-(a2) a-(a1) a-(c2)
-1/2 a^{a1,a2}_{c1,a0} b^{c1,v0}_{c0,c2} c^{c2}_{v0} a+(c0) a+(a0) a-(a2) a-(a1)
+1/2 a^{a1,a2}_{c1,a0} b^{c1,v0}_{c0,c2} c^{c2}_{v1} a+(c0) a+(a0) a+(v1) a-(v0) a-(a2) a-(a1)
-1/4 a^{a1,a2}_{c3,a0} b^{c2,v0}_{c0,c1} c^{c3}_{v0} a+(c0) a+(c1) a+(a0) a-(a2) a-(a1) a-(c2)
+1/4 a^{a1,a2}_{c3,a0} b^{c3,v0}_{c0,c1} c^{c2}_{v0} a+(c0) a+(c1) a+(a0) a-(a2) a-(a1) a-(c2)