$4x^8-4x^2$
$\frac{1+cscx}{cscx}=\frac{cos^2x}{1-sinx}$
$\sqrt{-384}$
$\left(c-1\right)^2$
$\cos\left(\frac{\pi}{-2}\right)$
$225=225$
$16x^4+8x^2+1$
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