A few personal observations: 1) A lot of frustration comes from bad expectations about how easy a math formulate should be to read. If I see 3 short lines of c

A few personal observations: 1) A lot of frustration comes from bad expectations about how easy a math formulate should be to read. If I see 3 short lines of code, my gut tells me "this will be easy", and it's right. If I see 3 lines of math I feel like it should be easy but then get frustrated when 30 minutes later I'm still looking at the same 3 lines. 2) Once you understand a formula, I often decided I couldn't write it any better myself. It's most useful as a tool for thought and remembering, not necessarily as a tool for teaching.