$\sqrt[3]{8a^6}$
$\frac{1}{\cos\left(\frac{\pi}{2}-u\right)}$
$cos\left(2a-2b\right)-cos\left(2a\right)$
$9x^2+30x+10=0$
$-4<-2+\frac{3}{y}$
$06,489+51.400$
$8^5+5$
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