$x2-15+56.25$
$2y+1+y$
$\lim_{x\to-\infty}\left(\frac{x^2}{\sqrt{x^2-1}}\right)$
$\left(12x\right)\left(12x\right)$
$-2x=32$
$\left(81+x^2\right)\left(81-x^2\right)$
$149.2-13.2$
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