convert matrix function to array

I have a function f 10x1 sym

t^3 + 2*t^2 + 5*t + 9
2*t^3 + 4*t^2 + 3*t + 8
3*t^3 + 6*t^2 + 5*t + 7
4*t^3 + 2*t^2 + 3*t + 6
5*t^3 + 4*t^2 + 5*t + 5
6*t^3 + 6*t^2 + 3*t + 4
7*t^3 + 2*t^2 + 5*t + 3
8*t^3 + 4*t^2 + 3*t + 2
9*t^3 + 6*t^2 + 5*t + 1
  10*t^3 + 2*t^2 + 3*t

If i use an xlswrite command I only get the letter f as value.

How do I convert this format to an array so i can performe diff and froote on each row?

thanks