I used to do this, but I preferred using lyx since it would typeset the equation as you typed it. I did it not for beautiful notes but out of sheer laziness. I

I used to do this, but I preferred using lyx since it would typeset the equation as you typed it. I did it not for beautiful notes but out of sheer laziness. I could copy and paste the previous equation and tweak it to form the next step. More so useful for homework.