$$H(N); 4x^{2}-12x+6$$
$112yx^{2}-5053508x^{2}-336xy+15160524x+252y-11370393$
$$112yx^{2}-5053508x^{2}-336xy+15160524x+252y-11370393$$
$$-5053508x^{2}-336xy+15160524x+112yx^{2}+252y-11370393$$
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$\left(2x-3\right)^{2},\ 1263377-28y$
