[Risolto] N. 235

235)

$-\big[\big(\frac{1}{2}-4+\frac{7}{3}\big)-\big(-1-\frac{1}{6}\big)-\big(-1-\frac{2}{3}\big)\big]$=

=$-\big[\big(\frac{3-24+14}{6}\big)-\big(\frac{-6-1}{6}\big)-\big(\frac{-1-2}{3}\big)\big]$=

=$-\big[-\frac{7}{6}-\big(-\frac{7}{6}\big)-\big(-\frac{5}{3}\big]$=

=$-\big[-\frac{7}{6}+\frac{7}{6}+\frac{5}{3}\big]$=

=$-\big[+\frac{5}{3}\big]$=

=$-\frac{5}{3}$

-[(1/2-4+7/3)-(-1-1/6)-(-1-2/3)]=

= -[(3-24+14)/6-(-7/6)-(-5/3)] =

= -[-7/6+7/6+5/3] =

= -[5/3] = -5/3