Question

helpppppppppp!!!!:(
Which of the following is equivalent to 5-3?
1/53
1/5-3
1/35
1/3-5
Which of the following is equivalent to -4-3?
1/-4-3
1/-43
1/-3-4
1/-34
Which of the following is equivalent to 10-2?
1/210
1/2-10
1/102
1/10-
Which of the following is equivalent to 1 / 2^-3?
2-3
23
32
3-2
Which of the following is equivalent to 1 / 7^-3?
73
7-3
37
3-7