Origin for each line in src/example01.red from check-in 5ce5316a33:
5ce5316a33 2021-03-01 jeff@gridfini: a:=sin (x); 5ce5316a33 2021-03-01 jeff@gridfini: b:=cos (x); 5ce5316a33 2021-03-01 jeff@gridfini: c:=a^2+b^2; 5ce5316a33 2021-03-01 jeff@gridfini: d:=a/b; 5ce5316a33 2021-03-01 jeff@gridfini: f:=tan (x)-d; 5ce5316a33 2021-03-01 jeff@gridfini: trigsimp c; 5ce5316a33 2021-03-01 jeff@gridfini: trigsimp f; 5ce5316a33 2021-03-01 jeff@gridfini: end;