$k^3+p^3$
$\frac{1-\tan\left(a\right)}{1+\tan\left(a\right)}$
$25x^6-20x+4x^2$
$\left(2x-x^2\right)^2$
$\lim_{x\to\infty\:}\left(\frac{x^3-2x+1}{4x+9}\right)$
$2cos\left(2x\right)sin\left(x\right)+\sqrt{3}sin\left(x\right)$
$ab-3a-2b+6$
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