I write 1, l, I, and | very distinctly and use a slashed zero so as to distinguish it from the letter O. My handwriting really similar. I use the cursive "l" i

I write 1, l, I, and | very distinctly and use a slashed zero so as to distinguish it from the letter O. My handwriting really similar. I use the cursive "l" in equations. Also I'm using Mathematica's i simbol for the imaginary unit [1] since teachers often forget about this and start using "i" for indexing sums too. It's quite common they appear in the same exponent. [1] http://www.unicodemap.org/details/0x2148/index.html http://www.unicodemap.org/details/0x2148/index.html