$\left(\sin\:\left(a\right)-\cos\:\left(a\right)^2\right)+\left(\sin\:\left(a\right)+\cos\:\left(a\right)^2\right)=2$
$\left|\frac{9}{\left(-3\right)^2}^2\right|^{-1}$
$-\sqrt{45}$
$-\cos^2\left(\left(2\pi\:\frac{1}{8}\right)\right)$
$16\cdot2-9y^2$
$\frac{-54}{-6}$
$\left(3x-3y\right)^3$
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