جاهای خالی را کامل کنید: $(x^{3} + [na-khana])([na-khana] + [na-khana])([na-khana] - [na-khana] + 1)$ $([na-khana] + 1) = (x + [na-khana])([na-khana] - [na-khana] + 4)$ $([na-khana]) = (2x - 3)([na-khana] + [na-khana] + [na-khana])$ $([na-khana] - [na-khana]) = (1 - x)([na-khana] + [na-khana] + [na-khana])$