$\frac{4x^2+21x+48}{x+7}$
$x^2+20x=-75$
$\lim_{x\to0}\left(\frac{4x\left(cos\left(6x\right)-1\right)}{sin\left(3x\right)-3x}\right)$
$\frac{1}{x}>2$
$4x+7=4\left(x+3\right)$
$10m-8n+14a$
$\left(6\sqrt{2x}\right).\left(4\sqrt[3]{3x^2}y\right)$
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