-2^2 là thành -4 rồi .-.

số dương 56 cũng có thể viết trong ngoặc là (56) mà bạn? nó k ảnh hưởng đến biểu thức .-.

bạn viết sai đề rồi 

III.     Choose the correct answer for each of the gaps to complete the following text.

          Television first came some sixty years ago in the 1950s. Nowadays, it is one of the most (1)                         sources of entertainment for both the old and the young. Television brings (2)              for children, world news, music and many other (3)              . If someone likes sports, he can just choose the right sports,  (4)                        . It is not difficult for us to see why (5)           is a TV set in almost every home today.

1. A.cheap       B.expensive              C.popular                      D.exciting

2. A.news        B.cartoons                C.sports                         D.plays

3. A.sets          B.reports                   C.channels                     D.programmes

4. A.athletes    B.channel                  C.time                            D.studio

5. A.it              B.this                        C.that                             D.there

Tìm số nguyên x, biết:
3x - 47.2 + x = -29 + -9

It takes us about more than 30 minutes to travel to the national museum.