1/2 a^{}_{} b^{c0,a0}_{a1,a2} c^{a3,a4}_{c1,v0} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a+(c1) a+(v0) a-(a0) a-(c0)
+1/4 a^{}_{} b^{c0,a0}_{a1,a2} c^{a3,a4}_{c1,v0} lambda2^{a1,a2}_{a3,a4} a+(c1) a+(v0) a-(a0) a-(c0)
-1/2 a^{}_{} b^{c0,a3}_{a1,a2} c^{a0,a4}_{c1,v0} lambda2^{a1,a2}_{a3,a4} a+(c1) a+(v0) a-(a0) a-(c0)