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2 × 1013 = 2026
Sum of 2 squares: 1² + 45² = 2026
Sum of 3 squares: 15² + 24² + 35² = 2026
Sum of 4 squares: 1² + 5² + 20² + 40² = 2026

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Mathematics is commonly called Math in the US and Maths in the UK.