Trailing data in Laravel when submitting form

I created an expense form in Laravel and tried to submit it for the data to be inserted into the database but after submitting this error got displayed:

"Trailing data"

I have tried all the possible ways I knew I could even searched through the net still couldn't find a solution to this problem.

I have been on it for the past hours.

Here is the create.blade

<div class="portlet light bordered">
    <h3 class="page-title">Expenses</h3>
    {!! Form::open(['method' => 'POST', 'url' => ['admin/save']]) !!}
    <div class="panel panel-default">
        <div class="panel-heading">
            Create
        </div>    
        <div class="panel-body">
            <div class="row">
                <div class="col-xs-12 form-group">
                    {!! Form::label('expenses_category_id', 'Expense Category*', ['class' => 'control-label']) !!}
                    {!! Form::select('expenses_category_id', $expenses_categories, old('expenses_category_id'), ['class' => 'form-control']) !!}
                    <p class="help-block"></p>
                    @if($errors->has('expenses_category_id'))
                        <p class="help-block">
                            
                        </p>
                    @endif
                </div>
            </div>
            <div class="row">
                <div class="col-xs-12 form-group">
                    {!! Form::label('entry_date', 'Entry date*', ['class' => 'control-label']) !!}
                    {!! Form::text('entry_date', old('entry_date'), ['class' => 'form-control date dpicker', 'placeholder' => '']) !!}
                    <p class="help-block"></p>
                    @if($errors->has('entry_date'))
                        <p class="help-block">
                            
                        </p>
                    @endif
                </div>
            </div>
            <div class="row">
                <div class="col-xs-12 form-group">
                    {!! Form::label('amount', 'Amount*', ['class' => 'control-label']) !!}
                    {!! Form::text('amount', old('amount'), ['class' => 'form-control', 'placeholder' => '']) !!}
                    <p class="help-block"></p>
                    @if($errors->has('amount'))
                        <p class="help-block">
                            
                        </p>
                    @endif
                </div>
            </div>

        </div>
    </div>
    {!! Form::submit('Save', ['class' => 'btn btn-danger']) !!}
    {!! Form::close() !!}
    </div>

The ExpensesController

public function store(StoreExpensesRequest $request)
    {
        Expense::create($request->all());

        return redirect('admin/expenses');
    }

the web.php

Route::post('/save', 'ExpensesController@store');

via Chebli Mohamed