by Vidya Ikawati 14 years ago
417
More like this
by Hector venega
by Nanda Septiani 74773
by IKA FITRIANI
by Teguh Arya yudanto
(x+a)^n=∑_(k=0)^n▒〖(n¦k) x^k a^(n-k)
a-b=i^nga
na