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Expand an simplfy.

3(x-6)(x+4)-(3x-5)^2

Is the answer -6x^2+24x-39

3(x-6)(x+4)-(3x-5)^2.

3(x^2+4x-6x-24)-(9x^2-30x+25).
3x^2+12x-18x-72-9x^2+30x-25
-6x^2+24x-97.

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