Its not too hard. And you dont have to be a mathematical expert.
To use it, you have to wait till the increasing numbers at the bottom stop.
Then, in the first row, in the "x1=_______" type in 0 (Zero. Just the number)
Then, where it says "y1=_______", type in "1/7"(Just the number(s) again.)
Then press the enter key, or equivalent, on your key board.
Beneath the numbers, a set of 5 diagrams will pop up, Choose which one you want to do, and start folding. I would recommend, to do the first one.
Hope the worded instructions help.

My Flickr
Hi! It's been a long while since I've been active on here. I deleted my Dropbox years ago, so some things, like my Dragonfly Varileg guide, are lost to time. I may still have other things, though! Email me if you have any questions.