$-8x^3+14x^2-16x-28$
$\lim_{x\to\infty}\left(\frac{2e^{2x}-1}{2x}\right)$
$3x^2-2x\cdot x+3$
$uv^4\cdot u^4$
$2x^2-6x<0$
$\sqrt{\left(2\sec\left(x\right)^3\right)-4}$
$z^2-2z^2+25z^2+12z^2+8z^2$
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