$w^2-12w+36$
$\frac{3x^2-5x^2+10x-3}{3x+1}$
$16\cdot16\cdot16\cdot16$
$49x^2-182x+169$
$cos2x=\frac{15}{17}$
$\int cont\:x\:\sqrt{csc\:x}dx$
$\lim_{x\to4}\left(\frac{x^2-4x}{16-4x}\right)$
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