3)
a) ( 5² - 2⁵ : 2 ) : 3 - 1²⁰¹⁹ =
= ( 25 - 2 ⁽ ⁵ ⁻ ¹ ⁾ ) : 3 - 1 =
= ( 25 - 2⁴ ) : 3 - 1 =
= ( 25 - 16 ) : 3 - 1 =
= 9 : 3 - 1 =
= 3 - 1 =
= 2
_____________________
b) ( 3² x 2⁶ - 2³ x 6 ) : 12 - 2³ = 36
= [ ( 3 x 2 )² x 2⁴ - 2³ x 6 ) : 12 - 8 =
= ( 6² x 2⁴ - 2³ x 6 ) : 12 - 8 =
= (6 x 2³ ) x ( 6 x 2 - 1 ) : 12 - 8 =
= ( 6 x 8 ) x 11 : 12 - 8 =
= 48 x 11 : 12 - 8 =
= 44 - 8 =
= 36
_________________
c) ( 7⁴ - 7³ ) : ( 7² - 7 ) - 2³ x 5 = 9
= 7³ ( 7 - 1 ) : 7 ( 7 - 1 ) - 8 x 5 =
= 7² - 40 =
= 49 - 40 =
= 9
