krixtoopher says
14 years ago
n(n-1)(n-2) ... (n-r+2) (all over) (r-1)! ang hirap mu mxado!!!
Ruuan13 says
14 years ago
feste na MATH!! PNG college mn d.i toh!! ahai!!! (annoyed)
krixtoopher says
14 years ago
(sick)
Ruuan13 says
14 years ago
(angry) X-( (annoyed) (tears)
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klaindy :) says
14 years ago
hahaha, pagsuway ra tawon na ;-)) GO GO.. kaya niu yan
krixtoopher says
14 years ago
(annoyed)