$2\:\:2^2+2$
$\left(6^4\cdot3\right)^3$
$-\tan\left(x\right)^2\:-\sec\left(x\right)^2$
$\lim_{x\to\infty}\left(\frac{\ln\left(9x\right)}{x^2}\right)$
$\left(22-x\right)^2$
$x^3\cdot x^3$
$3x+1<5x-4$
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