$sin3u\:=\:sin\:u\:\left(3\:-\:4sin^2u\right)$
$\left(5x^2+2b^4\right)^3$
$-15\::\:-5$
$x^3y^6+\frac{9}{27}z^3$
$\left(-4\right)\cdot\left(-6\right)\cdot10$
$\left(3-3b^2\right)^3$
$x^3-x^2+x^{-2}-5^2$
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