SOME JJ

fengli

M50，V28，

EAT A PIECE OF ALL FOUR，4m-12/（m（m-4））？perhaps incorrect  in this question

x。yinteger，xsquare-ysquare=7   y=？y=3

two GWD

RC：SAND DUNE，NURSE，ROCK ERODE BY BACTERIA

SORRY FOR MY MEMORY！