If i type the following in Cadabra2,
ex:=\frac{19}{2 x};
it gives 191/2x. In fact for any integer numerator it appends a 1 to it. What's going on?
191/2x
This was fixed a while ago, but the binaries for 14.04 have not been updated yet.
Your post contained a period character linking to black-lister dot com; please don't do that.