1/4 a^{c0,v2}_{a0,a1} b^{v0,v1}_{a3,v2} c^{a4}_{a2} gamma1^{a3}_{a4} a+(a0) a+(a1) a+(a2) a-(v1) a-(v0) a-(c0)
-1/2 a^{c0,v2}_{a0,a3} b^{v0,v1}_{a1,v2} c^{a4}_{a2} gamma1^{a3}_{a4} a+(a0) a+(a1) a+(a2) a-(v1) a-(v0) a-(c0)