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