$$( 3 ^ { - 1 } + 4 ^ { - 1 } + 5 ^ { - 1 } ) ^ { 0 }$$
$1$
$$\left(\frac{1}{3}+4^{-1}+5^{-1}\right)^{0}$$
$$\left(\frac{1}{3}+\frac{1}{4}+5^{-1}\right)^{0}$$
$$\left(\frac{7}{12}+5^{-1}\right)^{0}$$
$$\left(\frac{7}{12}+\frac{1}{5}\right)^{0}$$
$$\left(\frac{47}{60}\right)^{0}$$
$$1$$
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