$\sin\left(2\arcsin\left(\frac{4}{5}\right)+\frac{1}{2}\arccos\left(\frac{1}{2}\right)\right)$
$\frac{x^3-ax}{x^2+2}$
$5+5\left(2\right)\cdot\left(9-4\right)$
$-6xy-8x^2y+3x^2y-8xy$
$\frac{7}{t-1}-\frac{14}{t^2-1}$
$\sqrt[3]{130-5}$
$100.549^2$
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