$x^2+4+16$
$2^2\cdot2^3\cdot2^8$
$2x+2\sqrt{2x^{3}-x-2}$
$30x^2+3x-2$
$\lim_{x\to-3}\left(3x+4\right)\left(7x-9\right)$
$x-5x+36$
$\sec\left(x\right)^2-\sec\left(x\right)^2\csc\left(x\right)^2$
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