The mom of five who was mercilessly pummeled by a homeless maniac at a Queens subway station revealed her gruesome injuries Tuesday — while issuing a desperate plea to Mayor Eric Adams. “Our city needs major help,’’ said Elizabeth Gomes after removing her sunglasses to show her injuries from the horrific caught-on-camera attack, which included her eyes being swollen shut and a nasty gash over her right one. “We’re going through a lot here,’’ the 33-year-old woman told The Post. “I remember hearing that they would have cops posted on platforms, riding the trains, cops down in a subway. Mayor...