a) = 30
b) = 40
c) = - 44
d) = - 72
e) = 41
f) = 2
g) = - 15
h) = - 4
i) ( + 2 )³ = 2 x 2 x 2 = 8
j) ( - 3 )² = ( -3 ) x ( -3 ) = 9
k) ( - 4 )² = ( - 4 ) x ( - 4 ) = 16
l) ( - 1 )⁵⁰ = - 1
m) ( - 2 )³ x ( - 2 )² = ( - 8 ) x 4 = - 32
n) 3³ : ( -3 )² = 27 : 9 = 3
o) = ( - 2 )⁶ = 64
p) = 2⁵ = 32
r) = ( - 24 - 20 ) : ( - 11 ) = ( - 44 ) : ( - 11 ) = 4
s) = ( - 1 - 22 ) : 1 = ( - 23 ) : 1 = - 23