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(Solved): please help! Simplify. (cos2x+sec2x)(cos2x2) 2cos2xsin4x2sec2x+sin4xcot4x+2sin2xsin4x2se ...

please help!
$Simplify. \[ \left(\cos ^{2} x+\sec ^{2} x\right)\left(\cos ^{2} x-2\right) \] \[ \begin{array}{l} 2 \cos ^{2} x-\sin ^{4} x$

Simplify.

(cos^{2} x + sec^{2} x) (cos^{2} x ? 2)

2 cos^{2} x ? sin^{4} x 2 sec^{2} x + sin^{4} x ? cot^{4} x + 2 sin^{2} x sin^{4} x ? 2 sec^{2} x sin^{4} x ? \frac{2}{c o t ^{2} x}

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