In this task you will be given a list of integers. You should only return an integer if the first digit is the same as the last digit in the number. If an integer has a single digit, then it should be returned. If there are no integers that start and end with the same digit then an empty list ("[]") should be returned.
[711, -137, -457, -452, 526, -997, -125, -630, 139, 51, 445, 747, -751, -739, -40]