-1/2 a^{c0}_{c4} b^{c1,v0}_{a0,a1} c^{c4,a2}_{c2,c3} gamma1^{a1}_{a2} a+(c2) a+(c3) a+(a0) a-(v0) a-(c1) a-(c0)
+1/2 a^{c0}_{c4} b^{c4,v0}_{a0,a1} c^{c3,a2}_{c1,c2} gamma1^{a1}_{a2} a+(c1) a+(c2) a+(a0) a-(v0) a-(c3) a-(c0)