$\lim\:_{h\to\:0}\left(\frac{a^{-2}-\left(h+a\right)^{-2}}{h}\right)$
$9+4+12+5-1+8-1$
$8y^2+8y+2$
$9d^8-16\infty^{12}$
$\left[\left(x^6\:\right)^7\:\right]\:^0$
$x^3+3^2-4$
$\lim_{x\to1}\left(\frac{x^2+4x-5}{x^3-3x^2+3x-1}\right)$
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