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OMK 2018 A5

    Determine the value of (101×99)(101 \times 99) - (102×98)(102 \times 98) + (103×97)(103 \times 97) - (104×96)(104 \times 96) + ... ... + (149×51)(149 \times 51) - (150×50)(150 \times 50) .

    Dataset text AI-MO AoPS. Quoted with source.

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