Should I kill unfinished task in Windows Forms

In Windows Forms project I have the form that runs some task on the button click like this:

private void button_Click(object sender, EventArgs e)
{
    new Task(() => { DoSomeCalculations(); }).Start();
}

Suppose that the user close this form earlier than the task completed. Should I somehow kill unfinished task or will it finished automatically? Will application crash in this case or smth like this?

Thanks in advance.