Raw query parameters for IN clause Laravel

I've using Laravel DB::connection() for raw query, facing issue while passing parameters to IN clause.

web.php

Route::get("/track","App\Http\Controllers\Track@index");

view track.php

<form action="/track" method="post">

<textarea class="lined" rows="11" cols="60" name="tracking_id[]" id="output" value=""></textarea>

</form>

When html form submitted i am getting this value as a n array Array ( [_token] => JK4lmAZRq4O8Q3g14zy80BECrYEJpLX2vpbkkXvL [tracking_id] => Array ( [0] => UK484532537EE LA270424333EE ) )

Controller

public function index(Request $request){
//    prin
$tk = implode(',', $request->tracking_id);
$tracking_id = $request->input("tracking_id");
   $data = $request->all();
    $finalArray = array();
    foreach($data as $key=>$value)
    {
        array_push($finalArray, array(
                        'tracking_id'=>$value['tracking_id'])
        );
    }
    print_r($finalArray);
    $TrackModel = new TrackModel();
   $trackedAllData = $TrackModel->gettrackedAllData($finalArray);
  }

i want to pass this finalArray value to modal

Track_Model.php

 public static function gettrackedAllData($finalArray){

    return DB::connection('mysql')->select('SELECT a.awb_number, a.full_awb_number, a.service_type, b.country_code AS From_country, b.city AS From_city,c.city AS To_city, c.country_code AS To_country,MAX(s.created_at) AS created_at, datediff( max(s.created_at), min(s.created_at)) as Aging FROM customer_shippments a LEFT JOIN addresses b ON a.from_address = b.id LEFT JOIN addresses c ON a.to_address = c.id LEFT JOIN statuses s ON s.awb_number = a.awb_number WHERE a.full_awb_number IN ("'.$finalArray.'") GROUP BY s.awb_number');
  }

via Chebli Mohamed