b, 9 + 9/11 + 18/23 - 27/37 2 + 16/29 - 24/23 - 2/17 -------------------------------- - ---------------------------------- 8 + 8/11 + 16/23 - 24/37 3 + 24/29 - 36/13 - 3/17
Đăng ký qua Facebook hoặc Google: