$\sin a=\frac{8}{17}$
$\:\:log4\left(164\right)$
$4x^4+8x^3-4x^2$
$y^2=361$
$\left(5+4\right)^2-\left(5-4\right)^2-54$
$98,42\:x\:10^3\:.\:4,73\:x\:10^2$
$10y\:-\:16$
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