m/i(a5c,4-a;6j)4-2^/Ai(6îc,4- ^îa,)4- 2A/m(cî 6t-^^î«i

— 2(a,6,c, 4-a,6iC,)(//*4-^m*4- A/i*4- //n/i)

— 'i/a^a* (Cim^ ■+- ^,/i*)— igbxbz(Cil*-^ a^n}) — 2/ic,c,(6j^4-a,m-) 4-2(//— w/i)(^6iC,a,4-/iC|a,!?,)4- 2(^m — /i/)(Ac,a,6j4-/a,^iC,) 4- 2(/e/i — l'n)(JazbiCi-h gbzC^at)

-(Pb\c\-h m^c\al-h n^albl) 4- 2(^3^1 a, — Cfaibi){bigl -h Cihm -^ a^fn — Cihl — aj/m — b^gn) 4- 2 ( ^>, c, a^a^P 4- c,«, b^b^g* 4- a, 6,Ci Cj A*)

— 2^//(^>;a5C,4-c*a,6,)— 2/i/(cî^>,a,4-a;^>5C,)— a/S'(«l^î^»-^-^î^'^' -r-{^fl— imn)c^ata^b^'^ (4^'W — 2nl)a^bibiCi'^{^hn — 2/m)6,c,Cj«

4- 2(aj6,c,4- a,6,Cs) (/6, c, 4- /wc,a,4- ««i^j) — («j^jCj 4- «s^i^j)**