CHAO CAC BAN
theo cac ban nhung nguoi dang tham gia dien dan nay nhung nguoi yeu thich mon toan hay noi cach khac la dang say me theo duoi no thi co phai rang dan toan nhung nguoi yeu thich mon toan hoc thi kho kghan lam khong lang mang luon nguyen tac va chan ngat theo cac ban thi nhu the nao neu co nguoi da nhan xet chung ve dan toan chung ta nhu vay .Khong phai phai khong cac ban toi cho la nhu vay con cac ban thi sao hay cho nhan xet va chung minh loi no cua ban nha