$\frac{8}{1}^2$
$\left(8x+5\right)\left(8x-2\right)$
$\frac{\left(cos\:x+cot\:x\cdot sin\:x\right)}{2\:tan\left(\frac{\pi}{2}-x\right)}$
$436^2707$
$\frac{1}{2x^2-9x-5}$
$\lim_{x\to\pi}\left(\frac{sin\left(4x\right)}{sin\left(7x\right)}\right)$
$\lim_{t\to4}\left(\frac{t^2+3t-t}{2-\sqrt{8-t}}\right)$
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