$$x ^ { - 3 } , x = ( \frac { - 9 } { 5 } ) ^ { - 4 } + ( \frac { 18 } { 19 } ) ^ { 0 }$$
$y=\frac{282429536481}{371074950856}\approx 0.761111834$
$$x=\left(-\frac{9}{5}\right)^{-4}+\left(\frac{18}{19}\right)^{0}$$
$$x=\frac{625}{6561}+\left(\frac{18}{19}\right)^{0}$$
$$x=\frac{625}{6561}+1$$
$$x=\frac{7186}{6561}$$
$$y=\left(\frac{7186}{6561}\right)^{-3}$$
$$y=\frac{282429536481}{371074950856}$$
$$x=\frac{7186}{6561}$$ $$y=\frac{282429536481}{371074950856}$$
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