$-1.6-2.1$
$1\:-\left(2sin\theta\:\right)^2$
$\sin\left(50\right)^2$
$\sqrt[4]{-8}.\sqrt[4]{32}$
$\frac{d}{dx}\left(x^2+7y^2=7\right)$
$\left(w+7\right)\cdot\left(w+5\right)$
$-3+6\cdot50-5$
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