$\log_{10}\left(x+2y\right)=\log_{10}\left(4\right)$
$6v^2-26v+20$
$x-2y+3z=1$
$\left(1-\sen^{2}x\right)\tan x-\senx\cos x$
$-8x^4+4x^8-12x^5+16x^4$
$\int_{1\:}^{\infty\:\:}\left(\frac{1}{x}\right)dx$
$-\infty^5$
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