"Source: Text/Commut/RngDiff.text";
"Line: 168";
"Date: Thu Sep 25 14:47:46 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Commut/RngDiff.text, line: 168
// Example: H121E3 ()
print "Example: H121E3";
ei := GetEchoInput();
SetEchoInput(true);
S<t> := DifferentialLaurentSeriesRing(Rationals());
S;
SetEchoInput(ei);
