Ineed answering this question. any ideas on what it could be?

(hurry! ) which expression is equivalent to the following complex fraction?

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much