# Simplifying formulas » Negative and fractional powers

In the following examples the answer has to be written as a power of `a`.

1`a`^{5} = `a`^{–5}

= `a`^{15}

= (`a`^{2})^{19} = `a`^{29}

1`a` = 1`a`^{1} · `a`^{13} = 1`a`^{43} = `a`^{–43}

In the following example the answer has to be written without negative and fractional powers.

`a`^{–34} · `b`^{–3} = 1`a`^{34} · 1`b`^{3} = 1 · 1`b`^{3}