His rage and frustration 'expressed' [='showed, manifested'] 'themselves' as/in/through temper tantrums.
Her love of nature is 'expressed' [='shown, reflected'] in her paintings/music.
a room where nursing mothers can 'express' [='pump'] milk for their babies
(..) got to lose, Hiro? Do I know you? The name's Samuel, And I think we're gonna be great friends. - Did your roommate express any suicidal thoughts, Feelings of being overwhelmed, Low self-esteem? No. (..)2009 TvShow: Heroes Title: Chapter One 'Orientation/Jump, Push, Fall' Season: 4 Episode 1