sage: R.<m> = LaurentSeriesRing(QQ)
   sage: S.<t> = LaurentSeriesRing(pAdicField(11))
   sage: S(m^(-2) + 10*m + m^2 + O(m^3))
   t^1 + 10*t^3 + t^4 + O(t^5) + 10*t^4 + 10*t^3 + t^4 + O(t^5) + t^5 + 10*t^3 + t^4 + O(t^5) + O(t^6 + 10*t^3 + t^4 + O(t^5))