$10^2-11^2$
$-9x=-5x$
$\lim_{x\to3}\left(\frac{2x^2+7x-30}{x-3}\right)$
$f^3-64v^3$
$\frac{3x^3-14x^2+7x+4}{x-1}$
$\lim_{x\to0}\left(\frac{x^2}{1-3\cos\left(x\right)}\right)$
$4+2\left(9-12\right)$
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