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= f(½x)
=(½x)²+3
=¼x²+3
(fogoh)(x)
=f(g(h(x))
=f(g(½x))
=f(4(½x)-1)
=f(2x-1)
=(2x-1)²+3
=(2x-1)(2x-1)+3
=3x²-4x+4