-a^{c1,a0}_{c0,a2} b^{a1,a3}_{c2,c3} c^{c3}_{v0} gamma1^{a2}_{a3} a+(c0) a+(c2) a+(v0) a-(a1) a-(a0) a-(c1)
-1/2 a^{c0,a0}_{c3,a2} b^{a1,a3}_{c1,c2} c^{c3}_{v0} gamma1^{a2}_{a3} a+(c1) a+(c2) a+(v0) a-(a1) a-(a0) a-(c0)