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