Hi, guys.
I’m a complete newbie at Mikrotik environments, but I’ve been working for a long while at networking.
I give you the following graph I’ve made, and the explanation of what I want to do (if possible) is this:

To place a Routerboard RB600 with its four R52 cards; 3 of them will provide wireless connection to residential clients, and the fourth will be used to build a wireless link ptp to a RB133 which is connected to internet via an ethernet port.
I wish to bridge 3 of the RB600 R52’s (north, west and east) to the RB600 ethernet1 port, to use ether1 as a default gateway of the bridged network, and a static route to and from internet through the RB133.
Is this possible?
How it would be?
Thanks in advance!