$cos\left(y\right)=\frac{x}{3}$
$\tan\left(y\right)^2-\sin\left(y\right)^2$
$\frac{6^7}{6^2}$
$\left(4y+5x^2\right)^2$
$-\left(-9\right)\cdot\left(-5\right)$
$\frac{1}{2}x+3>5$
$\frac{x-2}{3}<5$
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