Sergey Litvinov - 2013-12-09

I manage to reduce it

display2d:false$
ratexpand(a*b*c)$
let(U,T)$
letsimp(U/n);

(%i1) display2d:false$
(%i2) ratexpand(a*b*c)$
(%i3) let(U,T)$
(%i4) letsimp(U/n);
(%o4) 1

I expect `T/n'.