$2^3.5^4.2^{-1}.5^2.5^3.2^{-2}.5^3.2^4$
$100-\left(-67\right)$
$9m+12$
$\left(6x-8\right)^2+8\left(6x-8\right)+16=0$
$x^2+4x+2\ge0$
$\frac{dy}{df}=8x$
$5-2t\ge\frac{2-4t}{2}$
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