Step-by-step explanation:

f (x) = 4x - 7

g (x) = 3x + 18

h (x) = -8x + 2

(f + g - h)(x) = f (x) + g (x) - h (x)

(f + g - h)(x) = 4x - 7 + 3x + 18 - (-8x + 2)

(f + g - h)(x) = 4x - 7 + 3x + 18 + 8x - 2

(f + g - h)(x) = 15x + 9

(f + g + h)(x) = f (x) + g (x) + h (x)

(f + g + h)(x) = 4x - 7 + 3x + 18 + (-8x + 2)

(f + g + h)(x) = 4x - 7 + 3x + 18 - 8x + 2

(f + g + h)(x) = -x + 13

(f - h)(x) = f (x) - h (x)

(f - h)(x) = 4x - 7 - (-8x + 2)

(f - h)(x) = 4x - 7 + 8x - 2

(f - h)(x) = 12x - 9

(f - h)(2) = 12 (2) - 9

(f - h)(2) = 15

I hope this helps