1/4 a^{a0,a1}_{a3,v0} b^{a2}_{c2} c^{c2,a4}_{c0,c1} gamma1^{a3}_{a4} a+(c0) a+(c1) a+(v0) a-(a2) a-(a1) a-(a0)
-1/4 a^{a0,a1}_{a3,v0} b^{a4}_{c2} c^{c2,a2}_{c0,c1} gamma1^{a3}_{a4} a+(c0) a+(c1) a+(v0) a-(a2) a-(a1) a-(a0)