The tool has always been as important as the technique. Once it was the slide rule, then the calculator, and now, computer is at the center stage.
LaTEX, a computer mark up language, is one of the tool that is still being used in scientific and academic community due to its precision, ease and portability. Unlike other commercial (although very popular solution), LaTEX is free and providing a simple introduction to the separation of content over style/formatting.
LaTEX might require some learning curve but the result is worth it. As an introduction, students might learn about LaTEX through editors like Codecogs before they can type it on their own.
My students use LaTEX to express trigonometry equations on their online assessment, below is the screen capture of one of my students’ work:
