Value of expression 2

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

Find the value of expression for the given values of the variables $x$ and $y$ .

\frac{x ^{2} - 2 x y + 4 y ^{2}}{x + 5} + \frac{3 x ^{2} - y ^{2}}{y - 7}

Input

Values of the variables $x$ and $y$ .

Print the value of expression up to thousandths.

Input #1

Answer #1

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