538)
$5-[-(-6-5)]=5-11=-6$
538)
$-(-5)-[-(-6-(-(-5)))]=$
$= 5-[-(-6-(+5))]=$
$= 5-[-(-6-5)]=$
$= 5-[-(-11)]=$
$= 5-[+11]=$
$= 5-11 = -6$
539)
$ \left[\dfrac{-(-(-2))·(-(-2))}{-4}\right]^{10}·\left[(-2)^3+(-2)^2\right]^2=$
$ = \left[\dfrac{-(+2)·2}{-4}\right]^{10}·\left[-8+4\right]^2=$
$ = \left[\dfrac{-2·2}{-4}\right]^{10}·\left[-4\right]^2=$
$ = \left[\dfrac{\cancel{-4}^1}{\cancel{-4}_1}\right]^{10}·16=$
$ = 1^{10}·16=$
$= 1·16= 16$