1/2 a^{a1}_{a0} b^{c0,a2}_{c2,c3} c^{c2,c3}_{c1,v0} a+(c1) a+(a0) a+(v0) a-(a2) a-(a1) a-(c0)
+a^{a0}_{a1} b^{c1,a2}_{c0,c4} c^{c3,c4}_{c2,v0} gamma1^{a1}_{a2} a+(c0) a+(c2) a+(v0) a-(a0) a-(c3) a-(c1)
-1/2 a^{a0}_{a1} b^{c0,a2}_{c2,c3} c^{c2,c3}_{c1,v0} gamma1^{a1}_{a2} a+(c1) a+(v0) a-(a0) a-(c0)