$\left(a^2\right)\left(a^{-2}\right)$
$\lim_{x\to-1}\left(\frac{x^2+5x-5}{x+2}\right)$
$\left(y^7\right)^{-5}$
$\left(\sqrt{x}+\frac{1}{3\sqrt{x}}\right)^2$
$2y^2-6y+5+15$
$\left(\frac{4}{5}-\frac{3}{4}x\right)^2$
$x+x+4y$
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