"Source: Text/Commut/RngDiff.text";
"Line: 1036";
"Date: Wed Sep 19 23:00:01 2018";
"Main: Thu May 25 10:02:38 2023";
// original file: Text/Commut/RngDiff.text, line: 1036
// Example: H118E17 ()
print "Example: H118E17";
ei := GetEchoInput();
SetEchoInput(true);
F<z> := RationalDifferentialField(Rationals());
Derivative(z^2 + 7/z);
Differential(z);
Differential(1/z+6+5*z);
S<t> := DifferentialLaurentSeriesRing(Rationals());
Derivative(5 + 2*t + 3*t^2);
SetEchoInput(ei);
