1.

a) fog = 2[(x+4)/(2x-5)] - 1 / (x+4)/(2x-5) - 2

= (2x + 8 - 2x + 5) / (x + 4 - 4x + 10)

= 13 / (- 3x+14)

b) gof = [(2x-1)/(x-2)]+4 / 2[(2x-1)/(x-2)] - 5

= (2x - 1 + 4x - 8) / (4x - 2 - 5x + 10)

= (6x - 9) / (- x + 8)

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