$m2-12m+27$
$\int\frac{2}{4x^2-4x+1}dx$
$e^{2t}cos^2t-cos^2t-e^{2t}$
$24-\frac{3i}{n}$
$-6x>\frac{1}{13}$
$\lim_{x\to0}\left(\frac{4x+sinx}{x}\right)$
$30ax\:+\:55bx$
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