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write expression using a positive exponent

  1. 4⁻¹

15.5⁻³

  1. -6⁻²

17 -3⁻³

18 3⁻⁵

19 10⁻⁴

20 p⁻¹

21 a⁻¹⁰

  1. d⁻³

23 q⁻⁴

  1. b⁻¹⁵

25 r⁻²⁰