1/4 a^{v1}_{v0} b^{a0,a1}_{c0,a2} c^{c0,a3}_{v2,v3} gamma1^{a2}_{a3} a+(v0) a+(v2) a+(v3) a-(v1) a-(a1) a-(a0)
-1/2 a^{v2}_{v0} b^{a1,a2}_{c0,a0} c^{c0,a3}_{v1,v2} a+(a0) a+(v0) a+(v1) a-(a3) a-(a2) a-(a1)
-1/2 a^{v2}_{v0} b^{a0,a1}_{c0,a2} c^{c0,a3}_{v1,v2} gamma1^{a2}_{a3} a+(v0) a+(v1) a-(a1) a-(a0)
-1/2 a^{v2}_{v0} b^{a0,a1}_{c0,a2} c^{c1,a3}_{v1,v2} gamma1^{a2}_{a3} a+(c0) a+(v0) a+(v1) a-(a1) a-(a0) a-(c1)