$\frac{dx}{dt}=tx$
$-x-2=-\left(x+2\right)$
$\frac{1-2x}{3}>3$
$\frac{1+\senx}{\cos x}+\frac{\cos x}{1+\senx}$
$25x^2+8xy$
$5a^3b^2c^2+6a^2b^3c^2+2a^4c^2$
$49x\:^2\:y\:^6\:z\:^{10}\:-\:a\:12$
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