Answer:
Option 1, 5 and 6 are equivalent.
Explanation:
To find : Which expressions are equivalent to
? Check all that apply.
Solution :
First we solve the expression,

1)
it is equivalent.
2)
it is not equivalent.
3)
it is not equivalent.
4)
it is not equivalent.
5)
it is equivalent.
6)
it is equivalent.
Therefore, option 1, 5 and 6 are equivalent.