Ответ:

Объяснение:

1 m/abc + c/abm =m^2+c^2 /abcm

2 d-1/2d-8 + d/d-4 = d-1 + 2d/2(d-4) = 3d-1/2(d-4)

3 x-2y/6x+6y + 2/x+y = x-2y + 12 / 6x+6y

4 6x/9x^2 - 1/3x-2 = 6x -3x-2 /(3x-2)(3x+2) = 3x-2/(3x-2)(3x+2) = 1/3x+2