revise adi lu~

Differentiation kill you off more ==

confuse oni la xD

differentiation easier for me =_=

Then you give up your Progression? xD

small change pls ==

progression no prob for me ady LOL

Who knows

ganbatte! XD

yerr, no gambatek for me TT

find YX to ganbatte u la ZZZZ

yerrr, you asl yx to say enough la... btw, don't write yx instead of xy again HHAHAHA

ask*

LOL!! today do add math, juz wrote her name again xD

imba --