Oh, come on... it can't be much harder then this...

p'x + (h sinA ) / L' = p''x - (h sinA ) / L' (n = 1..) 1/n(2k) = (-1)(k-1) PI(2k) 2(2k) B(2k) / ( 2(2k)!)

Now how do I convert this to KiXtart?... [Big Grin]