$$12^4 - \left( \matrix{ 12 \hfill \cr 1 \hfill \cr} \right) \times \left( \matrix{ 11 \hfill \cr 1 \hfill \cr} \right) \times \left( \matrix{ 10 \hfill \cr 1 \hfill \cr} \right) \times \left( \matrix{ 9 \hfill \cr 1 \hfill \cr} \right) =\frac{41}{96}$$