Finally!

Words I never thought I'd see in a math book:

"The advantage of Barrow’s method is that the algebra tends to be much easier, but the disadvantage is that why Barrow’s method works is not clear."

This is the way math is for me basically all the time. I don't know why shit works; the teacher tells me it does, so I do it. It's nice once in awhile to find out that smart math people don't have all the answers either.