$4\left(2x+4\right)-7\left(x+3\right)\ge0$
$2^{-6}\cdot2^3$
$6x-10x+20$
$\left(2b-5y\right)\left(4b-4y\right)$
$-9+-68+17+8+-44$
$\left(y\right)^'+\frac{y}{x}=x\sqrt{y}$
$z^6y^8-1$
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