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JEE Main 2023 (Online) 31st January Evening Shift

INTEGER+4 / -12023
The sum $1^{2}-2 \cdot 3^{2}+3 \cdot 5^{2}-4 \cdot 7^{2}+5 \cdot 9^{2}-\ldots+15 \cdot 29^{2}$ is _________.

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