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Factorize 64x3 + 1.

    • (4x + 1)(4x2 – 4x + 1)
    • (4x + 1)(16x2 + x + 1)
    • (4x + 1)(16x2 – 4x + 1)
    • (8x + 1)(8x2 – 4x + 1)