$\tan^4x\sec^3x$
$2cos^2\left(x\right)-2sin^2\left(x\right)=2cos\left(2x\right)$
$\frac{d}{dx}27\pi$
$\left(x-2\right)\left(x+2\right)\ge0$
$26d^2f^7-9c^6f^7$
$2x^4-11x^3+12x^2$
$789,456-83,9765$
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