$2x^4+x^2-4x-1-4^4-2x$
$\lim_{x\to0}\left(\frac{x^2+492x}{12sen\left(x\right)}\right)$
$0,5x-3,2y+5,4x+6,4y+5,1x+4$
$-4.87=\log\left(x\right)$
$-3x^2-\:-3x^2-\:-3x^2$
$\frac{dy}{dx}=\left(y-7\right)^2$
$\left(x+x+19\right)\left(x+x+19\right)$
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