Such the following example, we want to output "( 2s[9, 1] + s[10])t^4 +s[2, 2, 2, 2] * t^3+s[2, 2, 2]+t^2".
Example: t^2s[2, 2, 2] + t^3s[2, 2, 2, 2] + 2t^4s[9, 1] + t^4*s[10].
Or is it possible to extract the coefficients c of corresponding terms?