diff ( y , x , 1 ) = sin ( x ) - cos ( x ); ! Digits := 32; max_terms := 30; ! x_start := 0.0; x_end := 10.0; diff(y,0,exact_soln_y(x_start)); glob_look_poles := true; glob_max_iter := 100; ! exact_soln_y := proc(x) return(2.0 - cos(x) - sin(x)); end;