syntax error, unexpected '@', expecting ',' or ')' エラーの原因教えてください。

現在、Laravelで開発をしているのですが、下記コードで

<?php

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get(‘/’,function(){return redirect(‘/tasks’);});
Route::get(‘/tasks’,‘TaskController@index’);
Route::post(‘/tasks’,‘TaskController@store’);
Route::delete(‘/tasks/{task}’,’TaskController@destroy’);

\URL::forceScheme(‘https’);