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How to output in symmetric functions over QQ['t' ] in the form of 'c*t^i' ?

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?