$\csc^2x\sec^2x-\csc^2x-\sec^2x+1=1$
$4a^2x^3-4a^2$
$x^4+4x^2+10$
$2x+2^2$
$16-10x^2+16$
$\left(x-6\left(x+3\right)\right)$
$x^3-p^3$
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