2x mũ 3 - 4 x mũ 2 y + 2xy mũ 2
Câu thơ:"những kẻ vá trời khi lỡ bước
Gian nan chi kể việc con con
Có ý nghĩa gì?
Choose the best answer.
We are looking for ____ place to spend ____ night.
Please turn off ___ lights when you leave ___ room.
I like _____ colorful costumes of ____ ethnic minority people in Vietnam.