$tan\left(x\right)tan\left(x\right)-cos\left(x\right)cos\left(x\right)$
$\left(1+0.125\right)^{0.5}$
$\left(17xy\right)\left(10x^2y^3m\right)$
$\left(7+2i\right)\left(7-3i\right)$
$\left(6m+8\right)\left(6m-8\right)$
$\frac{\left(n^5+1\right)}{\left(n^2+1\right)}$
$\lim_{x\to0}\left(\frac{\sqrt{64+8x}-\sqrt{64-8x}}{x}\right)$
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