For two ackerman steering trailers, I'm sure the math is doable. But reality would probably prove an order of magnitude more difficult (at least) because slop in the pivot points means there are actually many more directions of motion possible. Increases the complexity of the problem dramatically.
Backing up one trailer with a steerable axle (which is the equivalent of two trailers) is not that hard. Backing up three trailers or more? I doubt anyone, including Volvo could do it for very long.