$x^2-12x=4$
$9x^2+126x+49$
$2\sqrt{3}-4\sqrt{48}$
$\left(m+4\right)\left(m-1\right)$
$a^2+a-56$
$\frac{\sin^2x}{\cos^2x}\left(1+\cot^2x\right)$
$\left(\frac{8m}{9n}+\frac{16p}{b}\right)a;\:m=6;\:n=\frac{1}{4};\:b=4;\:a=3$
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