$\cos^2x-\sin^2x=1-\sin^2x-\sin^2x$
$4+6\left(5-2\right)^2+8$
$\frac{\sin\left(x\right)+\sin\left(2x\right)}{\cos\left(x\right)-\cos\left(2x\right)}$
$\left(-1\:\right)\:+\:\left(-18\right)\:-\:\left(-16\right)+\:\left(\:-\:3\right)$
$\frac{256}{128}$
$\frac{4x-3}{-2}<-1$
$-6\left(5z\:+\:4\right)$
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