1/4 a^{v2}_{c2} b^{c0,c1}_{v0,v1} c^{c2}_{v2} a+(v0) a+(v1) a-(c1) a-(c0)
-1/2 a^{v2}_{c2} b^{c0,c2}_{v0,v1} c^{c1}_{v2} a+(v0) a+(v1) a-(c1) a-(c0)
-1/2 a^{v2}_{c2} b^{c0,c1}_{v0,v2} c^{c2}_{v1} a+(v0) a+(v1) a-(c1) a-(c0)
+a^{v2}_{c2} b^{c0,c2}_{v0,v2} c^{c1}_{v1} a+(v0) a+(v1) a-(c1) a-(c0)