$$(5x-3)(3-4x)+25x-9$$
$-20x^{2}+52x-18$
$$15x-20x^{2}-9+12x+25x-9$$
$$27x-20x^{2}-9+25x-9$$
$$52x-20x^{2}-9-9$$
$$52x-20x^{2}-18$$
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