Meanings of complicated mass in английском

The picture on the screen is a complicated mass of lines and numbers, with certain parts selected in yellow and red.

Happily there already exists a complicated mass of legislation that without any essential change of principle could be applied to this object.

Lights were already showing from the windows of the great hall on their right and from a more complicated mass of buildings straight ahead.

Moreover, they twist the traces into such an ingeniously complicated mass that it renders disentanglement almost impossible, even after exhaustion has reduced them to obedience.