$-4\left(5+x\right)-5\left(1-4x\right)$
$\frac{-2^3}{32}-\frac{1}{4}+\frac{1}{2}$
$-2\left(5k-7\right)$
$\frac{12x^4y^5}{3x^6y^7}$
$3x-2\left(4x-7\right)\ge9xen$
$-467^2$
$6\:+\:6x\:-\:x^2$
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