1/2 a^{a1,a3}_{a0} b^{a2}_{a4,v0,v1} eta1^{a4}_{a3} a+(a0) a+(v0) a+(v1) a-(a2) a-(a1)
+1/2 a^{a0,a2}_{a1} b^{a4}_{a3,v0,v1} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(v0) a+(v1) a-(a0)
+1/2 a^{a0,a2}_{a1} b^{a4}_{a3,v0,v1} lambda2^{a1,a3}_{a2,a4} a+(v0) a+(v1) a-(a0)
+1/4 a^{a2,a3}_{a1} b^{a0}_{a4,v0,v1} lambda2^{a1,a4}_{a2,a3} a+(v0) a+(v1) a-(a0)
-1/4 a^{a0,a1}_{a3} b^{a4}_{a2,v0,v1} gamma1^{a3}_{a4} a+(a2) a+(v0) a+(v1) a-(a1) a-(a0)