$x^2+x-5=0$
$\int9\left(6x-5\right)^{\frac{4}{7}}dx$
$\frac{x^2-64}{x+18}$
$\frac{cos2x+senx+1}{2senx+1}=senx$
$4x-\left\{3y-5z\left[-\left(2x+4y\right)+3x\right]-5y\right\}$
$\lim_{x\to\infty}\left(\frac{3}{\left(x+1\right)^x}\right)$
$-5r+\:8r\:+\:5$
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