I was at a buddies house the other day, his daughter in high school had left her math book out. There were symbols in there I have never seen before. It was not higher math just algebra but different. I was never a math whiz but did well with all the electrical mathematical theory and all of that back when. Whatever that new math was did not apply at all to real world formulas. Maybe it applies to accounting or something. I did not get a chance to quiz her on it. She probably would have escaped any way she could if I had.