-1/4 a^{v0}_{a0,a1,a2} b^{a3}_{v1,v2} gamma1^{a2}_{a3} a+(a0) a+(a1) a+(v1) a+(v2) a-(v0)
-1/6 a^{v1}_{a0,a1,a2} b^{a3}_{v0,v1} a+(a0) a+(a1) a+(a2) a+(v0) a-(a3)
+1/2 a^{v1}_{a0,a1,a2} b^{a3}_{v0,v1} gamma1^{a2}_{a3} a+(a0) a+(a1) a+(v0)