ページの作成:「You are in a public place and suppose you see someone following you. For all real numbers, b and c such that the product of c and 3 is b, which of the next expressions re…」
(ページの作成:「You are in a public place and suppose you see someone following you. For all real numbers, b and c such that the product of c and 3 is b, which of the next expressions re…」)