$\lim_{x\to0}\left(1+e^{\frac{4}{x}}\right)^x$
$-9x\le27$
$3\cos^2x+\cos x=2$
$2\left(2^2-1^3\right)$
$m^2+9m+8=0$
$3\left(8-9\right)-5\left(2-3+5-4+1\right)$
$3x^2+12x$
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