There is nothing available in the buildings that you mention. If you are specifically looking in just the above addresses it is best to work with a local Realtor like myself as we generally have a heads up if/when a unit becomes available .
My office is just outside of Harvard Square and I specialize in the Cambridge Market. I would love to set up a time / date to meet with you to discuss your housing needs. The Spring Market is just around the corner, new inventory is becoming available and I am here to help.