"Source: Text/Commut/RngDiff.text";
"Line: 144";
"Date: Wed Sep 19 23:00:01 2018";
"Main: Thu May 25 10:02:38 2023";
// original file: Text/Commut/RngDiff.text, line: 144
// Example: H118E2 ()
print "Example: H118E2";
ei := GetEchoInput();
SetEchoInput(true);
F<z> := RationalDifferentialField(Rationals());
F; 
SetEchoInput(ei);
