I cannot do this!

Number Theory Level 5

xx and yy are positive integers which satisfy:

4x2−y2=3154x^2-y^2=315

Suppose all of its solution can be stated in the form (x,y)=(xi,yi) (x,y) = (x_i, y_i) .

What is the value of ∑yi−∑xi \sum y_i - \sum x_i ?

Mehul Chaturvedi by Mehul Chaturvedi
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