order of multiplication in symbolic toolbox

Is there a way to define a symbolic variable as a matrix without specifying its dimension?

I know I can do, for example

A = sym('A',[m n]);

Ultimately I want multiplications of variables to preserve their order. For example,

A*X*A would result in X*A^2. If I could define A and X as matrices, it would keep that order; similarly for inverses.

Thanks!

dan