"Source: Text/Commut/RngDiff.text";
"Line: 144";
"Date: Thu Sep 25 14:47:46 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Commut/RngDiff.text, line: 144
// Example: H121E2 ()
print "Example: H121E2";
ei := GetEchoInput();
SetEchoInput(true);
F<z> := RationalDifferentialField(Rationals());
F; 
SetEchoInput(ei);
