$2^{10}2^{12}$
$-29=21-u$
$a^6-4a^3+4$
$\frac{x}{2}+3$
$tan\left(\frac{1}{2}-\frac{\sqrt{3}}{3}\right)$
$\tan\left(x\right)=\tan^2\left(x\right)\cot^2\left(x\right)$
$\frac{5}{4}\cdot4$
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