diff ( y , x , 1 ) = (0.1 * x + 0.2) + sin(0.3 * x + 0.1) ; ! Digits := 32; max_terms := 30; ! x_start := -5.0; x_end := 5.0 ; diff(y,0,exact_soln_y(x_start)); glob_look_poles := true; glob_max_iter := 1000000; glob_display_interval := 0.1; glob_max_minutes := 10; ! exact_soln_y := proc(x) return(0.05 * x * x + 0.2 * x - cos(0.3 * x + 0.1) / 0.3); end;