Exciting
4
Von chngdjkfdvmmgfbnvbbhhu
Easy to understand
complex
2
Von dhbxghavahha
i cant understand i am sorry for my mind
Normal
3
Von dbcxhb. fgb. c
It’s really useful and I can understand scientific
nice
3
Von zukmen
it is a good book
Ghh
4
Von shrdnyrvhgdvnyd
Cacnnv mcxghg
