90 degrees angle smooth I've got a model. 

It's shaded smooth in object mode (+ autosmooth). So everything's ok, but I need to smooth several 90 degrees angles. 3 angle is smooth, 2nd is not, the first one needs to be smooth too. How can I do that?

upd:
It looks to me like 3 has a bevel, but the others do not have the same bevel.
Try selecting the 90 degree edges and applying a bevel (ctrl B).