$\int\left(11^{-x}\right)dx$
$100c^2\:-\:36$
$m^2-2m+1=0$
$\lim_{x\to2}\left(x^2+2x-5\right)$
$y'+\frac{1}{x}y=x\:senx$
$n^2+8n-180$
$x^2-1\ge0$
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