$7\left(1+8y\right)$
$x^2-6x+8>-5x+x^2$
$818\:+\:1021$
$\sin^2x+2\cos^2x=2-\sin^2x$
$\frac{5x^3+7x^2+x-1}{x^2+1}$
$1^2\times\:3^2$
$racional\:2.3030030003$
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