a) 5x−4y5x-4y5x−4y+5x+4y5x+4y5x+4y = 5x - 4y + 5x + 4y = 10x
б) 2+3x−4x22+3x-4x^22+3x−4x2+4x2−3x+24x^2-3x+24x2−3x+2 = -4x^2 + 4x^2 + 3x - 3x + 2 + 2 = 4
a) 5x−4y5x-4y5x−4y+5x+4y5x+4y5x+4y = 5x - 4y + 5x + 4y = 10x
б) 2+3x−4x22+3x-4x^22+3x−4x2+4x2−3x+24x^2-3x+24x2−3x+2 = -4x^2 + 4x^2 + 3x - 3x + 2 + 2 = 4