$x^6-x^8$
$-5+\frac{63}{9}$
$h\left(x\right)=\log_{\frac{1}{2}}\left(2x\right)$
$2,96+2,39+5,29$
$2x^2-3x\:para\:x=3$
$\sqrt{\frac{x-4}{x^4+5}}$
$-x^2+9x^2$
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