$77^2-23^2$
$sin2x=\frac{15}{17}$
$-0.5x\le7.5$
$4x+5x-7x+5$
$7.2\sqrt{3}$
$\log\left(480\right)-2\log\left(x^2\right)-\log\left(24x^4\right)$
$\left|100\right|$
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