how do i do this in query

hi, i got a query but it's not summing well the "kmsTotais" , how do i fix this ? and make it to work? i yesterday asked how to do the sum and subtraction in elloquent to then try to pass it onto the selectraw like i did with abastecimento, but it didnt work, please help fix this , thanks

 $totalEurosAbastecimento = $quilometragem->sum('abastecimento_euros');
        $totalLitrosAbastecimento = $quilometragem->sum('abastecimento_litros');
        $totalrep = $valor->sum('reparacoes.valor');
        $data = DB::table("reparacoes")
        ->select(Reparacoes::raw("reparacoes.matricula,data_ne, $totalLitrosAbastecimento as totalLitrosAbastecimento, 
        $totalEurosAbastecimento AS totalEurosAbastecimento, $totalrep as totalrep,SUM(formulario.kmfim-formulario.quilometragem) AS kmsTotais"))
            ->leftJoin('formulario', 'reparacoes.matricula', '=', 'formulario.matricula')
            ->leftJoin('viaturas', 'reparacoes.matricula', '=', 'viaturas.matricula')
            ->orderBy("reparacoes.matricula")
            ->groupBy(DB::raw("reparacoes.matricula"))
            ->get();
//blade
 @foreach ($data as $item)
                        <tr>
                            <td>{{ $item->matricula }}</td>
                            <td>{{ $item->totalrep }}</td>
                            <td>{{ $item->data_ne }}</td>
                            <td>{{ $item->kmsTotais }}</td>
                       
                            <td>{{ $item->totalLitrosAbastecimento }}</td>
                            <td>{{ $item->totalEurosAbastecimento }}</td>
                           
                        </tr>
                        @endforeach
                  note: quilometragem exists both in formulario ,viaturas and reparacoes table