What is that's all right in Japanese?

To ask if it is alright to do something, the formula is [negative stem] + なくてもいい？ (nakute mo ii?). For example, if I wanted to ask if it was okay for me to turn in a math assignment tomorrow, I would say 明日、数学の宿題を出さなくてもいいですか (ashita, suugaku no shukudai wo dasa nakute mo ii desu ka).