(8x+5)(6(2x-6)-(8-6)-(8-6x)^2-(6x+9) (6x-9)
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(8x+5)(6(2x-6)-(8-6)-(8-6x)^2-(6x+9) (6x-9)
=(8x+5)(12x-36)-2-(64-96x+36x²)-(36x²-81)
=96x²-288x+60x-180-2-64+96x-36x²-36x²+81
=24x²-132x-165
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