Which of the following is equivalent to the expression h(x+2) + h(1/x+2) for h ≠ 0?
1) h(x+2) + 1/(x+2)
2) h(x+2) + 1/(x+2)²
3) h(x+2) + h/(x+2)
4) h(x+2) + h/(x+2)²