-1/2 a^{a0,a1}_{c0,c3} b^{c1,c3}_{c4,v0} c^{c4}_{c2} a+(c0) a+(c2) a+(v0) a-(a1) a-(a0) a-(c1)
-1/4 a^{a0,a1}_{c1,c2} b^{c1,c2}_{c3,v0} c^{c3}_{c0} a+(c0) a+(v0) a-(a1) a-(a0)
-1/2 a^{a0,a1}_{c3,c4} b^{c1,c3}_{c0,v0} c^{c4}_{c2} a+(c0) a+(c2) a+(v0) a-(a1) a-(a0) a-(c1)
-1/4 a^{a0,a1}_{c3,c4} b^{c3,c4}_{c0,v0} c^{c2}_{c1} a+(c0) a+(c1) a+(v0) a-(a1) a-(a0) a-(c2)