Which expressions are equivalent to g + h + (j + k)? Check all that apply. 1. g + (h + j) + k
2. (g + h) + j k
3. (g + h) + j + k
4. g + (h j) + k
5. g h + j k
6. g (h + j) k
7. g + h (j + k)
will give brainlist to the correct answer!!