-1/4 a^{c0,c1}_{c4,a0} b^{c2,a1}_{v0,v1} c^{c4}_{c3} gamma1^{a0}_{a1} a+(c3) a+(v0) a+(v1) a-(c2) a-(c1) a-(c0)
+1/4 a^{c0,c1}_{c4,a0} b^{c4,a1}_{v0,v1} c^{c3}_{c2} gamma1^{a0}_{a1} a+(c2) a+(v0) a+(v1) a-(c3) a-(c1) a-(c0)