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Omni-MATH / Find the number of quadruples (a,b,c,d) of integers with absolute value at most 5 such that (a²+b²+c²+d²)²=(a+b+c+d)(a−b+c−d)((a−c)²+(b−d)²) · Discussion

Discussing Find the number of quadruples (a,b,c,d) of integers with absolute value at most 5 such that (a²+b²+c²+d²)²=(a+b+c+d)(a−b+c−d)((a−c)²+(b−d)²) · Omni-MATH

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