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If f:RrarrR is defined by f(x) = x^2-3...

If `f:RrarrR` is defined by
`f(x) = x^2-3x+2`, find f(f(x))

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f(f(x)) = `f(x^2-3x+2)`
`= (x^2-3x+2)^2-3(x^2-3x+2)+2`
`= x^4+9x^2+4-6x^3+4x^2-12x-3x^2+9x-6+2`
`= x^4-6x^3+10x^2-3x`
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