$i^{\left(9\right)}\left(1+i^{\left(2\right)}\right)$
$a-a-a+a$
$\lim_{x\to\infty}\left(\frac{x}{2x-1}\right)^{\frac{1}{\left(x-1\right)}}$
$\left(5a-14\right)\left(5a-1\right)$
$\left(m-8\right).\left(m-4\right)$
$4\sqrt{3}\cdot\sqrt{21}$
$2x^4-2y^4$
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