The value of the expression 5#8835

The value of the expression 5

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Very easy

Calculate the value of the expression for given real numbers $x$ and $y$ .

\frac{x ^{2} + y ^{2}}{( x - y ) ^{2}} - \frac{2 x y}{x ^{2} + y ^{2}}

\frac{\sqrt{x^2 + y^2}}{(x - y)^2} - \frac{2xy}{\sqrt{x^2 + y^2}}

Input

The values of $x$ and $y$ , provided on a single line separated by a space.

The result of the expression, rounded to three decimal places.

Example 1

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\frac{x ^{2} + y ^{2}}{( x - y ) ^{2}} - \frac{2 x y}{x ^{2} + y ^{2}}