File src/example04.red from the latest check-in
a:=sin(x); b:=cos(x); c:=a+b; d:=c^2; % derivative df(d, x); % manual derivative 2*(a+b)*(df(a,x)+df(b,x)); end;
a:=sin(x); b:=cos(x); c:=a+b; d:=c^2; % derivative df(d, x); % manual derivative 2*(a+b)*(df(a,x)+df(b,x)); end;