Value of expression 1

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

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

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

Input

Two real numbers $x$ and $y$ .

Print the value of the given expression with precision to the thousandths.

Input #1

Answer #1

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