表达 vs. 表现 vs. 表示 vs. 显示 These four words all express (get it, because they all mean express ha ha ha) similar meanings: to express/show/display/manifest/demonstrate/convey/indicate etc. I'm sure there are subtle differences between these form words in terms of formality, usage, and semantics, but I'm not sure what they are. Perhaps some place more emphasis on "expressing" (ideas, for example) while others place more emphasis on "showing/displaying" (displaying one's wealth, for example)?

I would greatly appreciate you could express your opinions and knowledge (I am so sorry) on this issue, assuming you didn't already uninstall your browser after reading this.
表达, to express
他表达了他的爱意。to express something, used for expressions
表现, verb: to show, to perform. noun: behavior
verb 他表现出了他的才华。he has shown his talents.
noun 他的表现不是很好。 his behavior is not very good.
表示 means ...
这表示他喜欢你。this means that he likes you.
显示 to display or show.
手机能显示图片。phones can display/show pictures.
hope this helps.