Use the pointed end of a spudger in the top right corner of the motherboard and pry it out until you can get a good grip.

The front and the rear cameras are still connected to the motherboard. Don't damage them while you remove the motherboard.

Remove the motherboard.

On the back of the motherboard there are thermal pads (pink rubber-like gobs) for heat dissipation. If these thermal pads broke or are too dried out you might need to apply new thermal pads on the new display assembly or the motherboard.