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f(x) = x6 - 3x

g(x) = x2 - 4

f(g(x)) = f(x2 - 4) = (x2 - 4)6 - 3(x2 - 4)

= (x2 - 4)6 - 3x2 - 12

= (x12 - 24x10 + 240x8 - 1280x6 + 3840x4 - 6144x2 + 4096) - 3x2 - 12

= x12 - 24x10 + 240x8 - 1280x6 + 3840x4 - 6147x2 + 4084

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15y ago

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