$-4x^2+12x-9\le0$
$30\cdot1$
$\tan^2x=3$
$\lim_{x\to\infty}\left(\frac{x^2+3}{x^2+4x}\right)^{\left(\frac{x^2+1}{x}\right)}$
$\int6\left(x-1\right)dx$
$25b^2d^2-10bd^2+1$
$\left(3^8\right)^4$
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