a.) find (f+g)(x)

b.) find (fg)(2)

c.)(f o g)(x)

a) (f+g)(x) = X^2 - 1 + 2x + 3 = x^2 + 2x + 2

b) (fg)(x) = (x^2 - 1)(2x + 3) = 2x^3 + 3x^2 - 2x - 3

c) (fog)(x) = (2x+3)^2 - 1 = 4x^2 + 12x + 9 - 1 = 4x^2 + 12x + 8

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