$8\sin\:x+4\sqrt{2}=0$
$\frac{1}{5}-\frac{2}{5}sin^2x+\frac{1}{5}sin^4x$
$2\left(\frac{x+1}{x-1}\right)$
$\frac{3^{-2}}{3^2\cdot3^{-3}}$
$176\cdot23$
$\left(\frac{x}{2}\right)-\frac{1}{4}+2x\le x+3$
$4x^2-16x+16=144$
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