$x^9+1:x+1$
$4x\left(x-2\right)>-9$
$x^2+4x+5<0$
$3\sqrt{x}-\sqrt{x}$
$\left(5y+2m\right)^2$
$3x^2+6x-11+\left(13x^2-10x+3\right)$
$\frac{cos^2\left(x\right)}{sen\left(x\right)-1}$
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