$\frac{2x^2+1}{x-1}$
$\sqrt{\left(13\:+\:11^2\right)\:+\:\left(4\:+\:14^2\right)}$
$\left(12x-5\right)\left(3x+1\right)$
$5+9\left(1+2\right)$
$x^2\frac{1}{25}-4x\left(\frac{1}{25}\right)-1$
$\left(y+5\right)\cdot\left(y-10\right)$
$\lim_{x\to3}\left(5x^2-2x+7\right)$
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