/content/？ 57.html/ content/? 58.html's quadratic form, fraction, proof, congruence. Here is the second day: all free, no advertising. Follow-up: Thank you. I'll wait a few days to see if there is an answer. If there is no better score of 55, I will give it to you. Thank you. Thank you for asking: no, the first book in the first volume of the eighth grade is fractions. What is this? Answer: The order of this one is a bit out of order, but everything you want is in it.