$$\frac { } { n d \frac { 1 } { n d x } }$$
$x$
$$\frac{1}{\frac{n}{ndx}d}$$
$$\frac{1}{\frac{1}{dx}d}$$
$$\frac{1}{\frac{d}{dx}}$$
$$\frac{1}{\frac{1}{x}}$$
$$x$$
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$1$
$$\frac{\mathrm{d}}{\mathrm{d}x}(\frac{1}{\frac{n}{ndx}d})$$
$$\frac{\mathrm{d}}{\mathrm{d}x}(\frac{1}{\frac{1}{dx}d})$$
$$\frac{\mathrm{d}}{\mathrm{d}x}(\frac{1}{\frac{d}{dx}})$$
$$\frac{\mathrm{d}}{\mathrm{d}x}(\frac{1}{\frac{1}{x}})$$
$$\frac{\mathrm{d}}{\mathrm{d}x}(x)$$
$$x^{1-1}$$
$$x^{0}$$
$$1$$
