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(x² + 2x + 3x + 6) - (x² + x + 4x + 4)
x² + 2x + 3x + 6 - x² - x - 4x - 4
x² - x² + 2x + 3x - x - 4x + 6 - 4
5x - 5x + 6 - 4
2
Respuesta
2