$\lim_{x\to\infty}\left(\frac{x-1}{x}\right)$
$4\:x^2\:-12\:x\:+9\:=\:0$
$x^2-8x+10=0$
$\left(9a+9\right)\left(9a-3\right)$
$\lim_{x\to\infty}\left(\ln\left(x^2+1\right)\right)$
$\int\frac{x+8}{\left(x^2+9\right)}dx$
$\frac{\left(4a^{-2}\:b\:^{-1}\right)^{-3}}{\left(3a^{-1}\:b^2\:\right)\:^2}$
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