$\left(-2\right)^4+\left(-5\right)^2\left(-4\right)+\sqrt[3]{-8}+16\left(5\right)$
$c\left(x-3y\right)+d\left(3y-x\right)$
$\frac{d^2}{dx^2}\left(16x+18\right)^7$
$\frac{\sec\left(-t\right)}{\tan\left(-t\right)}=-csc\left(t\right)$
$cosx-sinx+sinx\:+cosx$
$3\cdot.5$
$\left(3secx-2\sqrt{3}\right)=0$
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