1/8 a^{c0,c1}_{a0,a1} b^{}_{} c^{a2,a3}_{v0,v1} gamma1^{a1}_{a3} gamma1^{a0}_{a2} a+(v0) a+(v1) a-(c1) a-(c0)
+1/16 a^{c0,c1}_{a0,a1} b^{}_{} c^{a2,a3}_{v0,v1} lambda2^{a0,a1}_{a2,a3} a+(v0) a+(v1) a-(c1) a-(c0)