-a^{v0}_{c0} b^{c0,a1}_{c1,a0} c^{c1}_{v0} a+(a0) a-(a1)
+a^{v0}_{c0} b^{c0,a1}_{c1,a0} c^{c1}_{v1} a+(a0) a+(v1) a-(v0) a-(a1)
-a^{v0}_{c0} b^{c1,a1}_{c2,a0} c^{c2}_{v0} a+(c0) a+(a0) a-(a1) a-(c1)
+a^{v0}_{c2} b^{c1,a1}_{c0,a0} c^{c2}_{v0} a+(c0) a+(a0) a-(a1) a-(c1)
-a^{v0}_{c2} b^{c2,a1}_{c0,a0} c^{c1}_{v0} a+(c0) a+(a0) a-(a1) a-(c1)