-1/2 a^{c1,c2}_{c0,c6} b^{c4,c6}_{c3,a0} c^{a1}_{c5} gamma1^{a0}_{a1} a+(c0) a+(c3) a+(c5) a-(c4) a-(c2) a-(c1)
-1/4 a^{c0,c1}_{c4,c5} b^{c4,c5}_{c2,a0} c^{a1}_{c3} a+(c2) a+(c3) a+(a0) a-(a1) a-(c1) a-(c0)
-1/4 a^{c0,c1}_{c4,c5} b^{c4,c5}_{c2,a0} c^{a1}_{c3} gamma1^{a0}_{a1} a+(c2) a+(c3) a-(c1) a-(c0)