$x^8+5x$
$x\:2\:+\:x\:-20\:x+5$
$8f+4g=2f+g$
$sen^{-1}\left(\frac{1}{3}\right)+\:tan^{-1}\left(x\right)=\:\frac{\pi}{2}$
$+107-229,1$
$\frac{dy}{dt}+.5ty=7t$
$\left(3x^2+1\right)\left(e^x+\sin\left(x\right)\right)^2$
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